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=Text=
=Text=
{{#Wiki_filter:WEB-BASED PROPOSED ALTERNATIVE SUBMISSION                                                      10 CFR 50.55a(z)(1)
{{#Wiki_filter:WE B-BAS ED P ROP OSE D AL TER NATIVE S UBMI SS ION 10 C FR 50.5 5 a( z)( 1)
Submission Date: March 07, 2022 Submitted By: Mary Emanuelson Document Sensitivity: Non-Sensitive Licensee: Xcel Energy Plant Unit(s) and Docket No(s): Monticello (05000263)
Su bm issio n Da te: M a rc h 07, 20 2 2 Su bm itte d By : Ma ry Em a n u el son Doc u me n t S en sitiv it y: No n-S e nsi tiv e Lic e nse e : Xc e l En er gy Pla nt Uni t(s) a nd Do c ke t No(s): M on ti ce ll o (0 50 00 2 63 )
Licensee
Lic e nse e Co nt ac t: Ma ry Em a n ue l so n ma ry.e m a n ue lso n @x c el e ne rg y. c om (61 2 ) 3 30-5 85 0


==Contact:==
Pr oje c t T itle :
Mary Emanuelson mary.emanuelson@xcelenergy.com (612) 330-5850 Project
10 CF R 5 0.5 5a Re qu e st Asso c ia te d with t he M o nt ic e llo S ixt h Inse rv ic e T est ing T e n-Ye a r I nt erv a l O MN-2 8 (L-MT-22-0 07 )


==Title:==
Pr op o se d Alt er n ati ve N um be r o r Id en tifi er :
10 CFR 50.55a Request Associated with the Monticello Sixth Inservice Testing Ten-Year Interval OMN-28 (L-MT-22-007)
VR-0 8
Proposed Alternative Number or Identifier:
VR-08 Request Type:
10 CFR 50.55a(z)(1)
Inservice Inspection (ISI) or Inservice Testing (IST)
Inservice Testing (IST)
Requested Completion Date:
February 28, 2023 Brief Description of Proposed Alternative Northern States Power Company, a Minnesota corporation, doing business as Xcel Energy (hereafter 'NSPM'),
hereby requests NRC authorization of this 10 CFR 50.55a request to support the implementation of the sixth IST ten-year interval for Monticello Nuclear Generating Plant (MNGP). Proposed Relief Request VR-08 requests to adopt ASME Code Case OMN-28, 'Alternative Valve Position Verification Approach to Satisfy ISTC-3700 for Valves Not Susceptible to Stem-Disk Separation'. This submittal makes no new commitments and no revisions to existing commitments.
Proposed Duration of Alternative (in terms of ISI/IST Program Interval with Start and End Dates):
This request, upon approval, will be applied to the MNGP sixth IST ten-year interval starting October 1, 2022, and is scheduled to end May 31, 2032.
Applicable ASME Code Requirements ISTC-3700, 'Position Verification Testing', states that valves with remote position indicators shall be observed locally at least once every two years to verify that valve operation is accurately indicated. Where practicable, this local observation should be supplemented by other indications such as use of flow meters or other suitable instrumentation to verify obturator position. These observations need not be concurrent. Where local observation is not possible, other indications shall be used for verification of valve operation. Position verification for active Motor Operated Valves (MOVs) shall be tested in accordance with Mandatory Appendix III, 'Preservice and Inservice Testing of Active Electric Motor-Operated Valve Assemblies in Water-Cooled Reactor Nuclear Power Plants', of this Division.Mandatory Appendix III, subparagraph III-3300, 'Inservice Test', (e) states that remote position indication shall be verified locally during inservice testing or maintenance activities.10 CFR 50.55a(b)(3)(xi) imposes the following ASME OM condition for use of the 2012 or later editions of the OM Code for 'Valve Position Indication': 'When implementing paragraph ISTC-3700, 'Position Verification Testing', in the ASME OM Code, 2012 Edition through the latest edition and addenda of the ASME OM Code incorporated by reference in paragraph (a)(1)(iv) of this section, licensees shall verify that valve operation is accurately indicated by supplementing valve position indicating lights with other indications,


such as flow meters or other suitable instrumentation to provide assurance of proper obturator position for valves with remote position indication within the scope of Subsection ISTC including its mandatory appendices and their verification methods and frequencies'.
Req ue st Ty pe :
Applicable American Society of Mechanical Engineers (ASME) Boiler and Pressure Vessel Code (BPV Code), or ASME Operation and Maintenanceâ-of Nuclear Power Plants (OM Code), Edition and Addenda American Society of Mechanical Engineers (ASME) OM Code, Operation and Maintenance of Nuclear Power Plants, 2017 Edition with no Addenda.
10 CF R 5 0.5 5a (z )(1 )
Current ISI or IST Program Interval Number and Start/End Dates MNGP is currently on its fifth IST ten-year interval that is scheduled to end on September 30, 2022. The MNGP sixth IST ten-year interval begins on October 1, 2022.
Applicable ASME Code Components and/or System Description The valves covered and affected by this 10 CFR 50.55a(z)(1) alternative are those valves equipped with remote position indication that have been determined to be stem-disk separation non-susceptible valve(s) as defined in ASME Code Case OMN-28, Alternative Valve Position Verification Approach to Satisfy ISTC-3700 for Valves Not Susceptible to Stem-Disk Separation.
The tables below provide the list of valves that are within the scope of Alternative Request OMN-28 (Note 1)
MOVs, Motor Operated Valves Component ID          Component ID          Component ID          Component ID MO-1426                MO-2015              MO-2068                MO-2-53A MO-1751                MO-2020              MO-2071                MO-2-53B MO-1752                MO-2021              MO-2075                MO-3502 MO-1753                MO-2022              MO-2076                MO-4085A MO-1754                MO-2023              MO-2078                MO-4085B MO-2002                MO-2029              MO-2096                MO-4086 MO-2003                MO-2030              MO-2100                MO-4229 MO-2006                MO-2032              MO-2101                MO-4230 MO-2007                MO-2033              MO-2102                MO-1986 MO-2008                MO-2034              MO-2106                MO-1987 MO-2009                MO-2035              MO-2107                MO-1988 MO-2010                MO-2036              MO-2373                MO-1989 MO-2011                MO-2061              MO-2374                MO-1741 MO-2012                MO-2062              MO-2397                MO-1742 MO-2013                MO-2063              MO-2398                MO-1749 MO-2014                MO-2067              MO-2407                MO-1750 MV, Manual Valves Component ID CS-13-1 CS-13-2 RHR-6-1 RHR-6-2


XP-8 AOVs, Air Operated Valves Component ID          Component ID          Component ID          Component ID CV-3-32A              AO-2-80A              AO-2382E              CV-3311 CV-3-32B              AO-2-80B              AO-2382F              CV-3312 CV-3-32C              AO-2-80C              AO-2382G              CV-3313 CV-3-32D              AO-2-80D              AO-2382H              CV-3314 CV-3-33A              AO-2-86A              AO-2382K              CV-2371 CV-3-33B              AO-2-86B              AO-2383                CV-2372 CV-3-33C              AO-2-86C              AO-2386                CV-2082A CV-3-33D              AO-2-86D              AO-2387                CV-2104 CV-2046A              AO-2377                AO-2896                CV-2790 CV-2065                AO-2378                AO-4539                CV-2791 CV-1478                AO-2379                AO-4540                CV-1994 CV-7956                AO-2380                CV-2384                CV-1995 AO-2541A              AO-2381                CV-2385                CV-1996 AO-2541B              AO-2382A              CV-3267                CV-1997 AO-2561A              AO-2382B              CV-3268                CV-1728 AO-2561B              AO-2382C              CV-3269                CV-1729 Note 1: OMN-28 may be applied to all valves in the IST program that meet OMN-28 requirements in the future.
In se r vic e In spe c tio n (ISI) or Inse r vi ce Te sting (IS T)
Inse rv ic e Te sti ng (IS T)


===Reason for Request===
Req ue ste d Co mp le tio n Da te :
In accordance with 10 CFR 50.55a(z)(1), NSPM is requesting approval to adopt ASME OM Code Case OMN-28, Alternative Valve Position Verification Approach to Satisfy ISTC-3700 for Valves Not Susceptible to Stem-Disk Separation for those valves that can be defined, categorized, and documented by engineering justification as stem-disk separation non-susceptible valves(s).
Fe br ua ry 2 8, 2 02 3
Proposed NRC amendments to 50.55a(b)(3)(xi) will allow schedule flexibility for valves determined to be not susceptible to stem-disc separation by specifying that position verification testing required by ISTC-3700 may be performed on a 10-year interval (rather than the 2-year interval specified in ISTC-3700) where justification is documented and available for NRC review (Reference 1). Such documentation would be required to demonstrate that the stem-disk connection is not susceptible to separation based on the internal design and evaluation of the stem-disk connection using plant-specific and industry operating experience, and vendor recommendations. This allows design information and performance data to be applied in demonstrating that a valve is not susceptible to stem-disk separation.
The ASME Code committees have prepared Code Case OMN-28, Alternative Valve Position Verification Approach to Satisfy ISTC-3700 for Valves Not Susceptible to Stem-Disk Separation. This Code Case has not been approved for use in Regulatory Guide 1.192, Operation and Maintenance Code Case Acceptability, ASME OM Code, Revision 4, December 2021. This Code Case has been approved by ASME and is listed in the Applicability Index from ASME Codes and Standards, as applicable through the 2020 Edition of the ASME OM Code.


This Code Case mirrors the philosophy and methodology of the proposed NRC modifications to 50.55a(b)(3)
Br ie f De sc ri pti on o f P ro p ose d Alte r na tiv e Nort he rn S ta te s P owe r Com p a ny, a M inn e so ta c or po ra tio n, d o ing b u sin ess a s Xc e l En e rg y (he re a fte r 'N SP M'),
(xi) for valves determined to be non-susceptible to stem-disc separation. The Code Case differs in that it proposes a 12-year rather than a 10-year interval. In accordance with 10 CFR 50.55a(z)(1), the relaxation of the prescribed intervals for performing ISTC-3700 supplemental position verification requirements in accordance with the 50.55a(b)(3)(xi) condition would provide an acceptable level of quality and safety for valves meeting the OMN-28 definition of stem-disk separation non-susceptible valve(s).
he re b y req u e st s NRC a ut ho riz a tio n o f th is 10 C FR 50.5 5 a re qu e st t o sup po rt th e im p le m en ta ti on o f t he si xt h IST te n-ye a r i nte rv a l f or Mo n tic e llo Nu c le a r Ge n era ti ng P la n t (M NGP ). P ro po se d Re lie f R e qu e st VR- 08 req u e st s to a d op t ASM E Cod e Ca se OM N-2 8, 'Al te rna ti ve V al ve P o sitio n Ve rifi ca ti on Ap p roa c h to S a tisfy ISTC-37 0 0 fo r Va lv e s No t S usc e p tib le to S te m-Disk S e pa ra tio n '. T h is su bm i tta l m a k e s n o ne w c o m m itm e n ts an d n o re visi on s t o ex isti ng c o m m itm e n ts.
Full Description of Proposed Alternative In lieu of compliance with ISTC-3700, NSPM proposes to implement the ASME OM Code Case OMN-28 on the basis that it provides an acceptable level of quality and safety in accordance with 10 CFR 50.55a, Codes and standards, paragraph (z)(1).
Description of Basis for Use The valves covered by this code case are those stem-disk separation non-susceptible valves with remote position indication within the scope of Subsection ISTC, including its mandatory appendices and their verifications methods and frequencies, in accordance with regulatory requirements.
Valves with remote position indication within the scope of ASME OM Code, Subsection ISTA, paragraph ISTA-1100, not satisfying the scope and provisions of this code case shall meet the valve position verification requirements in ASME OM Code, Paragraph ISTC-3700, in accordance with regulatory requirements.
To categorize a valve as not susceptible to stem-disk separation, the valve shall have a documented justification that the stem-disk connection is not susceptible to separation based on the internal design, service conditions, applications, and evaluation of the stem-disk connection using plant-specific and industry operating experience, and vendor recommendations.
Valves with remote position indicators that are not susceptible to stem-disk separation shall be verified to accurately represent valve operation as discussed in paragraph 1.4, Position Verification Testing Requirements for Valves Not Susceptible to Stem-Disk Separation, of the Code Case.
Code Case OMN-28 was approved for use by the ASME on March 4, 2021.
No deviations from the Code Case are being proposed.
Describe Hardship or Unusual Difficulty NOT APPLICABLE Any Additional Information (submission attachments listed here)
NOT USED (No Attachments)
Precedents Braidwood Station, Units 1 and 2; Calvert Cliffs Nuclear Power Plant, Units 1 and 2; Clinton Power Station, Unit No. 1; Limerick Generating Station, Units 1 and 2; Nine Mile Point Nuclear Station, Units 1 and 2; Peach


Bottom Atomic Power Station, Units 2 and 3; and R.E. Ginna Nuclear Power Plant - Safety Evaluation for Proposed Alternative to Use ASME Code Case OMN-28 (EPID L-2021-LLR-0056), dated September 3, 2021 (ADAMS Accession Number ML21230A206).
Pr op o se d Du r ati on o f Alt er n ati ve (in te rm s o f ISI/IS T P r og r am In te r va l w ith Sta r t a nd E nd Da te s):
References
Th is re q ue st, u po n a pp ro v al, wi ll b e a p pl ie d to th e M NGP sixt h IST te n-ye a r int er va l sta rtin g Oc to be r 1, 2 02 2,
: 1. Federal Register / Vol. 86, No. 57 / Friday, March 26, 2021 / Proposed Rules
an d is sc h e du le d to e n d Ma y 3 1, 2 0 32.
: 2. ASME OM Code Case OMN-28, Alternative Valve Position Verification Approach to Satisfy ISTC-3700 for Valves Not Susceptible to Stem-Disk Separation.}}
 
App lic a ble ASM E Co de Req ui r em e nts ISTC-37 0 0, 'P osi tio n Ve rific a tio n Te sti ng ', sta te s th a t v a lv e s with re m o te p o sitio n in d ic at ors sha ll b e ob se rv ed loc a ll y at le a st o n ce ev e ry two y e ar s to v e rify th a t v a lv e op e ra tio n is ac c u ra te ly in di ca te d. Wh e re pr ac ti ca b le,
thi s lo c al o bse rv a tio n sho u ld b e sup p le m e nte d b y o th er in di ca ti on s su c h a s use of flo w m e te rs o r o th e r su ita b le inst rum e n ta tio n to v e rify o bt ura t or po siti on. Th ese ob se rva ti on s n e e d no t be c o nc u rre n t. W h ere lo ca l ob se rva ti on i s n ot po ssib le, ot he r i nd ic a tio n s sh al l b e u se d for ve ri fic at io n of va lv e o p era ti on. Po siti on ve rifi ca ti on f or ac ti ve M o to r Op e ra te d Val ve s ( MOVs) sha ll b e te ste d in a c c ord a nc e wi th M an d at ory A pp e nd ix III, 'P re se rvi ce an d In se rvi ce Te stin g of Ac tiv e El ec t ric M ot or-Op e ra te d Va lv e Asse mb li es in Wa t er-C oo le d Re ac to r N uc le a r P ow er Pl an ts', o f th is D ivi sio n. Ma n da to ry Ap p en d ix III, su bp a ra gra p h III-3 30 0, 'I nse rv ic e Te st', (e) sta te s th a t rem o te p o sitio n in d ic a tio n sha ll b e ve ri fie d lo ca ll y du rin g in se rvi c e te stin g o r m a in te na n c e ac ti vi tie s.1 0 CF R 5 0. 55 a (b )(3) (xi ) im p o se s th e fol lo win g ASM E O M co n di tio n for u se of th e 20 1 2 or la te r ed iti on s o f t he O M Cod e fo r 'Va l ve P o si tio n In di ca ti on ': 'Wh e n im pl em e n tin g p ara g ra ph I STC-37 0 0, 'P osi tio n Veri fic a tio n Te stin g ', i n th e ASM E OM Co de, 20 1 2 Ed iti on th ro u gh th e la t est e di tio n a nd a d de n da of th e ASM E OM C od e in c o rpo ra te d b y ref ere n c e in p a rag ra p h (a )(1)( iv) o f th is se c ti on, lic e nse e s sh a ll v e rify t ha t va lv e o pe ra ti on is a cc u ra te ly in d ic at ed b y su pp le m e nt in g va lv e p osi tio n in di ca t ing l ig ht s with o th e r in d ic a tio ns, su c h a s flo w m e te rs or ot he r su it ab le i nst rum e n ta tio n to p ro vi de a ssu ra nc e o f p ro pe r ob tu ra to r p osi tio n fo r va lv e s wit h rem o te p o sitio n in d ic a tio n with in th e sc o pe o f Su bse c tio n IS TC in cl ud in g its m an d a tor y ap p en d ic e s an d th e ir v e rifi ca ti on m e th o ds an d fre q ue n c ie s'.
 
App lic a ble Ame r ic a n So ci e ty of Me c ha n ic al En gin e e rs (ASM E) Boi le r a nd Pr e ssur e Ve sse l Co d e (BP V Cod e ), o r AS ME O pe r at ion a n d M a inte n an c eâ-o f Nuc le a r Po we r Pla n ts (O M Co de ), Edi tio n an d Add en da Ame ri ca n S oc ie t y of Me c ha n ic a l E ng in e e rs (AS ME ) OM Co d e, Op e ra tio n a nd M a in te na n ce of Nuc l ea r Po we r Pla n ts, 20 1 7 Ed itio n wit h no Ad d en d a.
 
Cur r en t IS I o r IS T Pr o g ra m In te rv a l Nu m be r a nd S tar t/ End Da te s MNGP is cu rre n tly o n its fifth I ST te n-ye a r i nte rv a l t ha t is sc h ed u le d to e n d on S e pte m b e r 3 0, 2 02 2. Th e MNGP six th IS T te n-y e a r in te rv a l b e gi ns on Oc to b er 1, 2 0 22.
 
App lic a ble ASM E Co de Com p on e nts a n d/o r S yste m De sc r ip tio n
 
Th e va lv e s c o ve re d a nd a ffe c te d b y th is 1 0 CF R 5 0. 55 a (z )(1 ) a lte rn a tiv e a re th o se va lv e s e q ui pp e d with re m o te po siti on in d ic a tio n th a t h a ve b e e n de te rm in e d to b e ste m-di sk sep a ra tio n n on-su sce p tib le v a lv e (s)a s d efi ne d in ASM E Co de C ase O MN-2 8, Alt e rna ti ve Va lv e P osi tio n Ve rific a ti on Ap p roa c h to S a tisfy IS TC-3 7 00 fo r Val ve s No t Su sc ep ti bl e to St em-Disk Se p a rat io n.
 
Th e ta bl es be lo w p ro v ide th e list of va l ve s t ha t are with in th e sc o pe o f A lte rn at iv e Re qu e st OM N-2 8 (No te 1 )
 
MO Vs, Mo tor O pe r ate d Va lv es
 
C om p o ne n t ID Co m po ne n t ID Co m po n e nt ID Co m p on e nt ID M O-1 42 6 M O-2 0 15 MO-2 0 68 M O-2-5 3 A M O-1 75 1 M O-2 0 20 MO-2 0 71 M O-2-5 3 B M O-1 75 2 M O-2 0 21 MO-2 0 75 M O-35 0 2 M O-1 75 3 M O-2 0 22 MO-2 0 76 M O-40 8 5A M O-1 75 4 M O-2 0 23 MO-2 0 78 M O-40 8 5B M O-2 00 2 M O-2 0 29 MO-2 0 96 M O-40 8 6 M O-2 00 3 M O-2 0 30 MO-2 1 00 M O-42 2 9 M O-2 00 6 M O-2 0 32 MO-2 1 01 M O-42 3 0 M O-2 00 7 M O-2 0 33 MO-2 1 02 M O-19 8 6 M O-2 00 8 M O-2 0 34 MO-2 1 06 M O-19 8 7 M O-2 00 9 M O-2 0 35 MO-2 1 07 M O-19 8 8 M O-2 01 0 M O-2 0 36 MO-2 3 73 M O-19 8 9 M O-2 01 1 M O-2 0 61 MO-2 3 74 M O-17 4 1 M O-2 01 2 M O-2 0 62 MO-2 3 97 M O-17 4 2 M O-2 01 3 M O-2 0 63 MO-2 3 98 M O-17 4 9 M O-2 01 4 M O-2 0 67 MO-2 4 07 M O-17 5 0
 
MV, Ma nu a l Va lv e s
 
Co m p on e n t ID CS-1 3-1 CS-1 3-2 RH R-6-1 RH R-6-2 XP-8
 
AOV s, Ai r O pe r ate d Va lv e s
 
C om p o ne n t ID Co m po ne n t ID Co m po n e nt ID Co m p on e nt ID CV 3 2 A A O-2-8 0 A AO-2 38 2 E CV-3 3 11 CV 3 2 B A O-2-8 0 B AO-2 38 2 F CV-3 3 12 CV 3 2 C A O-2-8 0 C AO-2 38 2 G CV-3 3 13 CV 3 2 D A O-2-8 0 D AO-2 38 2 H CV-3 3 14 CV 3 3 A A O-2-8 6 A AO-2 38 2 K CV-2 3 71 CV 3 3 B A O-2-8 6 B AO-2 38 3 CV-2 3 72 CV 3 3 C A O-2-8 6 C AO-2 38 6 CV-2 0 82 A CV 3 3 D A O-2-8 6 D AO-2 38 7 CV-2 1 04 CV -20 4 6A A O-23 7 7 AO-2 89 6 CV-2 7 90 CV -20 6 5 A O-23 7 8 AO-4 53 9 CV-2 7 91 CV -14 7 8 A O-23 7 9 AO-4 54 0 CV-1 9 94 CV -79 5 6 A O-23 8 0 CV-2 38 4 CV-1 9 95 AO-25 41 A A O-23 8 1 CV-2 38 5 CV-1 9 96 AO-25 41 B A O-23 8 2A CV-3 26 7 CV-1 9 97 AO-25 61 A A O-23 8 2B CV-3 26 8 CV-1 7 28 AO-25 61 B A O-23 8 2C CV-3 26 9 CV-1 7 29
 
Note 1: OM N-2 8 m ay b e a p pl ie d to a ll va lv e s in t he IS T pro g ra m th a t m e e t OM N-2 8 re qu ire m e n ts in t he fut ure.
 
Rea so n for Re q ue st
 
In ac c o rda n c e with 1 0 CF R 50.55a(z )(1), NSP M is r eq u est in g ap p rov a l t o a do p t AS ME OM Co d e Ca se OM N-28, Al te rna ti ve Val ve P o sitio n Ve rifi ca ti on Ap p roa c h to S a tisfy IS TC-37 0 0 for Va lv es Not Su sc e pt ib le to Ste m-Disk S e pa ra ti on fo r th o se v al ve s t ha t ca n b e d ef in ed, ca te g o riz e d, a nd d o cu m e nt e d by e n gi ne e rin g just ific a tio n a s ste m-d isk se pa ra tio n n on-su sc ep tib le va lv e s(s).
 
Pro po se d NRC a me n d me n ts t o 50.5 5 a (b)(3 )(x i) will a llo w sc h ed u le fl ex ib ili ty fo r v a lve s de te rm in e d to b e no t su sc e pt ib le to ste m-d isc se p ara t ion b y sp e ci fyi ng t ha t po siti on v e rific a ti on te sti ng re q u ire d by IS TC-37 0 0 m ay be p e rfo rm ed o n a 1 0-ye a r i nte rv a l ( rat he r tha n t he 2-y e ar in te rva l spe c ifi ed i n IST C-3 70 0 ) wh e re ju stifi ca ti on i s do c um e n te d an d a v ai la bl e fo r NRC re vi ew (Re fe re nc e 1 ).S uc h d oc u m e nta t ion w ou ld b e re qu ire d t o de m o nstr at e th at th e ste m-d isk c on n e ct ion i s n ot su sce p tib le t o sep a ra tio n b ase d o n th e in te rn al d esi gn a n d ev a lu at io n of th e ste m-di sk co n ne c ti on u sin g pl an t-sp e c ific a n d in du stry o p e rat in g ex p e rie nc e, an d v e nd o r rec o m m en d a tio ns. Th is al lo ws d esi gn i nfo rm a tio n a nd p e rfo rm a nc e d a ta to b e a pp li ed i n de m o nst ra tin g th at a va lv e is no t su sc e pt ibl e to ste m-d isk se pa ra ti on.
 
Th e ASM E Cod e c o m m itte e s h a ve p re p ar ed C od e Ca se OM N-2 8, Alte rn a tiv e Va lv e P osit io n Ver ific a tio n App ro ac h to S a tisfy IS TC-37 0 0 for Va lv es Not S usc e pt ib le to S te m-Disk S e pa ra tio n.T h is Co d e Ca se h as no t be e n a pp ro ve d fo r u se in R eg u la to ry Gui de 1.1 9 2, Op e ra tio n a nd M a in te na n ce Co de C ase A cc e p ta bi lity, ASM E OM Cod e, Re visi on 4, De ce m b e r 2 02 1. Th is Co d e Ca se h as be e n a pp ro v ed b y AS ME a nd i s list ed i n th e App lic a b ilit y Ind e x fro m AS ME Co de s an d S ta nd a rds, a s a p pl ic ab le t hro u gh t he 20 2 0 Ed itio n o f th e AS ME OM Cod e.
Th is Co d e Ca se m irro rs t he p h ilo sop h y a nd m e th o do lo gy o f the pro p ose d NRC m o dif ic at io ns to 50.5 5 a (b)( 3)
(xi ) fo r v a lv es de te rm in e d to b e n on-su sce p tib le t o ste m-di sc sep a ra tio n.Th e Co de C ase dif fer s in th a t i t pro p ose s a 1 2-y ea r rat he r tha n a 1 0-y ea r int er va l.In a c c or da n ce with 1 0 CF R 5 0. 55 a (z )(1 ), t he rel ax a tio n o f th e pre sc rib e d in te rva ls for p erf orm in g IS TC-3 7 00 su p pl em e n ta l p o sitio n v e rific a tio n re q ui rem e n ts i n ac c o rda n c e with th e 5 0. 55 a (b )(3 )(xi ) c o nd iti on wo u ld p rov id e a n a cc e p ta bl e le ve l o f q ua li ty a nd sa fe ty fo r v a lv e s m e et in g the OMN-2 8 d e fin itio n o f ste m-d isk se pa ra tio n n on-su sc ep tib le va lv e (s).
 
Ful l De sc r ipt ion o f P r op ose d Alte r n ati ve
 
In lie u o f c om p li an c e with I STC-37 0 0, NS PM p ro po se s to i mp le m e n t th e AS ME OM Co d e Ca se OM N-28 o n the ba sis tha t it pro v id es a n ac c e pt ab le l e ve l of qu a lit y an d sa fe ty in a c c ord a nc e wi th 1 0 CFR 5 0. 55 a, Co d e s an d sta n da rd s, p a ra gra p h (z )(1 ).
 
Desc r ip tio n of Ba sis fo r Use Th e va lv e s c o ve re d b y th is c o de c a se a re th o se ste m-di sk sep a ra tio n n on-su sce p tib le v a lv e s with r em o te po siti on in d ic a tio n with in t he sc o pe of Su b se c ti on IS TC, in c lu di ng i ts m a n da to ry a pp e n dic e s a n d th e ir ve rifi ca ti on s m e th o ds an d fre q ue n c ie s, i n ac c o rda n c e with re g u la to ry re qu ire m e nt s.
Val ve s wi th re m ot e po sit io n ind ic a tio n wit hi n th e sco p e o f AS ME OM Co de, Su b se ct io n IST A, pa ra g rap h IS TA-1 1 00, no t sa ti sfyi ng t he sc o pe an d p ro visi on s o f t hi s c od e c a se sha ll m e e t th e v a lv e po siti on v e rific a tio n re q ui rem e n ts i n ASM E OM Co de, Pa ra g rap h IS TC-3 7 00, in a c co rd a nc e wit h reg u la to ry re qu ire m e n ts.
To c at eg o riz e a v a lv e a s no t susc e p tib le to st em-d isk se p a rat io n, th e v al ve sh a ll ha v e a d oc u m e nt ed just ific a tio n th a t t he st em-d isk c o nn e c tio n is n o t su sc ep ti bl e to se pa ra ti on b a sed o n th e in te rn a l d e sig n, se rv ic e c o nd iti on s, ap p lic a tio n s, a n d e va lu a tio n o f th e ste m-d isk c on n e ct io n usin g p la nt-spe c ifi c a nd ind u stry o pe ra ti ng e x pe rie n c e, a n d ve n do r rec o m m e nd a tio ns.
Val ve s wi th re m ot e po sit io n ind ic a to rs t ha t are no t su sc e pt ib le to ste m-d isk se pa ra ti on sh a ll be v e rifi ed to a cc u ra te ly re p rese n t v a lv e o pe ra tio n a s d isc u sse d i n pa ra g rap h 1.4, P osi tio n Ve rific a tio n T est ing Re qu ire m e nt s fo r Va lv e s No t S u sc e p tib le t o Ste m-Disk S e pa ra ti on, o f t he Cod e Ca se.
Cod e Ca se OM N-2 8 wa s a pp ro v ed fo r use b y th e AS ME o n Ma rc h 4, 2 0 21.
No de v ia tio n s fro m th e Co d e Ca se a re b ei ng p ro po se d.
 
Desc r ib e H ar d ship o r Un usu al Diff ic ulty NOT AP PL ICABL E
 
Any Ad dit io na l In fo rm a tio n (sub m issio n a tta c hm e nts liste d h er e )
 
NOT US ED (No Atta c h m en ts)
 
Pr ec e d en ts Bra id woo d St a tio n, Un its 1 an d 2 ; Ca l ve rt Clif fs Nu cl ea r Po we r P la nt, Un it s 1 a nd 2 ; Clin to n Po we r S ta ti on,
Unit No. 1 ; Lim e ric k Ge n e rat in g Sta ti on, Uni ts 1 a n d 2; Nin e M ile P o int Nu c le ar St at io n, Un its 1 a n d 2 ; P ea c h Bot to m Ato m ic P owe r Sta ti on, Uni ts 2 a n d 3; a nd R.E. Gin n a Nu cl ea r Po we r P la nt -S a fe ty Ev a lu at io n for Pro po se d Alte rn a tiv e to Use ASM E C od e Ca se OM N-2 8 (EP ID L-20 2 1-L LR- 00 5 6), d at ed S e pt em b e r 3, 20 2 1 (ADAMS Ac c e ssio n Num b e r M L2 12 3 0A 20 6 ).
 
Refe r e nc e s
: 1. F e de ra l R eg ist er / Vo l. 8 6, No. 5 7 / Fri da y, M a rc h 26, 20 2 1 / P ro po se d Ru le s
: 2. AS ME OM Co d e Ca se OM N-28, Alte rn a tiv e Va lv e Po siti on Ve ri fic at io n App ro a ch t o Sa tisf y IST C-3 70 0 for Va lve s Not Su sc e pt ibl e to S te m-Disk S ep a ra tio n.}}

Revision as of 14:16, 18 November 2024

10 CFR 50.55a Request Associated with the Monticello Sixth Inservice Testing Ten-Year Interval OMN-28 (LMT-22-007)
ML22067A084
Person / Time
Site: Monticello Xcel Energy icon.png
Issue date: 03/07/2022
From: Emanuelson M
Northern States Power Co, Xcel Energy
To:
Document Control Desk, Office of Nuclear Reactor Regulation
References
LMT-22-007
Download: ML22067A084 (5)
v • d • e


Text

WE B-BAS ED P ROP OSE D AL TER NATIVE S UBMI SS ION 10 C FR 50.5 5 a( z)( 1)

Su bm issio n Da te: M a rc h 07, 20 2 2 Su bm itte d By : Ma ry Em a n u el son Doc u me n t S en sitiv it y: No n-S e nsi tiv e Lic e nse e : Xc e l En er gy Pla nt Uni t(s) a nd Do c ke t No(s): M on ti ce ll o (0 50 00 2 63 )

Lic e nse e Co nt ac t: Ma ry Em a n ue l so n ma ry.e m a n ue lso n @x c el e ne rg y. c om (61 2 ) 3 30-5 85 0

Pr oje c t T itle :

10 CF R 5 0.5 5a Re qu e st Asso c ia te d with t he M o nt ic e llo S ixt h Inse rv ic e T est ing T e n-Ye a r I nt erv a l O MN-2 8 (L-MT-22-0 07 )

Pr op o se d Alt er n ati ve N um be r o r Id en tifi er :

VR-0 8

Req ue st Ty pe :

10 CF R 5 0.5 5a (z )(1 )

In se r vic e In spe c tio n (ISI) or Inse r vi ce Te sting (IS T)

Inse rv ic e Te sti ng (IS T)

Req ue ste d Co mp le tio n Da te :

Fe br ua ry 2 8, 2 02 3

Br ie f De sc ri pti on o f P ro p ose d Alte r na tiv e Nort he rn S ta te s P owe r Com p a ny, a M inn e so ta c or po ra tio n, d o ing b u sin ess a s Xc e l En e rg y (he re a fte r 'N SP M'),

he re b y req u e st s NRC a ut ho riz a tio n o f th is 10 C FR 50.5 5 a re qu e st t o sup po rt th e im p le m en ta ti on o f t he si xt h IST te n-ye a r i nte rv a l f or Mo n tic e llo Nu c le a r Ge n era ti ng P la n t (M NGP ). P ro po se d Re lie f R e qu e st VR- 08 req u e st s to a d op t ASM E Cod e Ca se OM N-2 8, 'Al te rna ti ve V al ve P o sitio n Ve rifi ca ti on Ap p roa c h to S a tisfy ISTC-37 0 0 fo r Va lv e s No t S usc e p tib le to S te m-Disk S e pa ra tio n '. T h is su bm i tta l m a k e s n o ne w c o m m itm e n ts an d n o re visi on s t o ex isti ng c o m m itm e n ts.

Pr op o se d Du r ati on o f Alt er n ati ve (in te rm s o f ISI/IS T P r og r am In te r va l w ith Sta r t a nd E nd Da te s):

Th is re q ue st, u po n a pp ro v al, wi ll b e a p pl ie d to th e M NGP sixt h IST te n-ye a r int er va l sta rtin g Oc to be r 1, 2 02 2,

an d is sc h e du le d to e n d Ma y 3 1, 2 0 32.

App lic a ble ASM E Co de Req ui r em e nts ISTC-37 0 0, 'P osi tio n Ve rific a tio n Te sti ng ', sta te s th a t v a lv e s with re m o te p o sitio n in d ic at ors sha ll b e ob se rv ed loc a ll y at le a st o n ce ev e ry two y e ar s to v e rify th a t v a lv e op e ra tio n is ac c u ra te ly in di ca te d. Wh e re pr ac ti ca b le,

thi s lo c al o bse rv a tio n sho u ld b e sup p le m e nte d b y o th er in di ca ti on s su c h a s use of flo w m e te rs o r o th e r su ita b le inst rum e n ta tio n to v e rify o bt ura t or po siti on. Th ese ob se rva ti on s n e e d no t be c o nc u rre n t. W h ere lo ca l ob se rva ti on i s n ot po ssib le, ot he r i nd ic a tio n s sh al l b e u se d for ve ri fic at io n of va lv e o p era ti on. Po siti on ve rifi ca ti on f or ac ti ve M o to r Op e ra te d Val ve s ( MOVs) sha ll b e te ste d in a c c ord a nc e wi th M an d at ory A pp e nd ix III, 'P re se rvi ce an d In se rvi ce Te stin g of Ac tiv e El ec t ric M ot or-Op e ra te d Va lv e Asse mb li es in Wa t er-C oo le d Re ac to r N uc le a r P ow er Pl an ts', o f th is D ivi sio n. Ma n da to ry Ap p en d ix III, su bp a ra gra p h III-3 30 0, 'I nse rv ic e Te st', (e) sta te s th a t rem o te p o sitio n in d ic a tio n sha ll b e ve ri fie d lo ca ll y du rin g in se rvi c e te stin g o r m a in te na n c e ac ti vi tie s.1 0 CF R 5 0. 55 a (b )(3) (xi ) im p o se s th e fol lo win g ASM E O M co n di tio n for u se of th e 20 1 2 or la te r ed iti on s o f t he O M Cod e fo r 'Va l ve P o si tio n In di ca ti on ': 'Wh e n im pl em e n tin g p ara g ra ph I STC-37 0 0, 'P osi tio n Veri fic a tio n Te stin g ', i n th e ASM E OM Co de, 20 1 2 Ed iti on th ro u gh th e la t est e di tio n a nd a d de n da of th e ASM E OM C od e in c o rpo ra te d b y ref ere n c e in p a rag ra p h (a )(1)( iv) o f th is se c ti on, lic e nse e s sh a ll v e rify t ha t va lv e o pe ra ti on is a cc u ra te ly in d ic at ed b y su pp le m e nt in g va lv e p osi tio n in di ca t ing l ig ht s with o th e r in d ic a tio ns, su c h a s flo w m e te rs or ot he r su it ab le i nst rum e n ta tio n to p ro vi de a ssu ra nc e o f p ro pe r ob tu ra to r p osi tio n fo r va lv e s wit h rem o te p o sitio n in d ic a tio n with in th e sc o pe o f Su bse c tio n IS TC in cl ud in g its m an d a tor y ap p en d ic e s an d th e ir v e rifi ca ti on m e th o ds an d fre q ue n c ie s'.

App lic a ble Ame r ic a n So ci e ty of Me c ha n ic al En gin e e rs (ASM E) Boi le r a nd Pr e ssur e Ve sse l Co d e (BP V Cod e ), o r AS ME O pe r at ion a n d M a inte n an c eâ-o f Nuc le a r Po we r Pla n ts (O M Co de ), Edi tio n an d Add en da Ame ri ca n S oc ie t y of Me c ha n ic a l E ng in e e rs (AS ME ) OM Co d e, Op e ra tio n a nd M a in te na n ce of Nuc l ea r Po we r Pla n ts, 20 1 7 Ed itio n wit h no Ad d en d a.

Cur r en t IS I o r IS T Pr o g ra m In te rv a l Nu m be r a nd S tar t/ End Da te s MNGP is cu rre n tly o n its fifth I ST te n-ye a r i nte rv a l t ha t is sc h ed u le d to e n d on S e pte m b e r 3 0, 2 02 2. Th e MNGP six th IS T te n-y e a r in te rv a l b e gi ns on Oc to b er 1, 2 0 22.

App lic a ble ASM E Co de Com p on e nts a n d/o r S yste m De sc r ip tio n

Th e va lv e s c o ve re d a nd a ffe c te d b y th is 1 0 CF R 5 0. 55 a (z )(1 ) a lte rn a tiv e a re th o se va lv e s e q ui pp e d with re m o te po siti on in d ic a tio n th a t h a ve b e e n de te rm in e d to b e ste m-di sk sep a ra tio n n on-su sce p tib le v a lv e (s)a s d efi ne d in ASM E Co de C ase O MN-2 8, Alt e rna ti ve Va lv e P osi tio n Ve rific a ti on Ap p roa c h to S a tisfy IS TC-3 7 00 fo r Val ve s No t Su sc ep ti bl e to St em-Disk Se p a rat io n.

Th e ta bl es be lo w p ro v ide th e list of va l ve s t ha t are with in th e sc o pe o f A lte rn at iv e Re qu e st OM N-2 8 (No te 1 )

MO Vs, Mo tor O pe r ate d Va lv es

C om p o ne n t ID Co m po ne n t ID Co m po n e nt ID Co m p on e nt ID M O-1 42 6 M O-2 0 15 MO-2 0 68 M O-2-5 3 A M O-1 75 1 M O-2 0 20 MO-2 0 71 M O-2-5 3 B M O-1 75 2 M O-2 0 21 MO-2 0 75 M O-35 0 2 M O-1 75 3 M O-2 0 22 MO-2 0 76 M O-40 8 5A M O-1 75 4 M O-2 0 23 MO-2 0 78 M O-40 8 5B M O-2 00 2 M O-2 0 29 MO-2 0 96 M O-40 8 6 M O-2 00 3 M O-2 0 30 MO-2 1 00 M O-42 2 9 M O-2 00 6 M O-2 0 32 MO-2 1 01 M O-42 3 0 M O-2 00 7 M O-2 0 33 MO-2 1 02 M O-19 8 6 M O-2 00 8 M O-2 0 34 MO-2 1 06 M O-19 8 7 M O-2 00 9 M O-2 0 35 MO-2 1 07 M O-19 8 8 M O-2 01 0 M O-2 0 36 MO-2 3 73 M O-19 8 9 M O-2 01 1 M O-2 0 61 MO-2 3 74 M O-17 4 1 M O-2 01 2 M O-2 0 62 MO-2 3 97 M O-17 4 2 M O-2 01 3 M O-2 0 63 MO-2 3 98 M O-17 4 9 M O-2 01 4 M O-2 0 67 MO-2 4 07 M O-17 5 0

MV, Ma nu a l Va lv e s

Co m p on e n t ID CS-1 3-1 CS-1 3-2 RH R-6-1 RH R-6-2 XP-8

AOV s, Ai r O pe r ate d Va lv e s

C om p o ne n t ID Co m po ne n t ID Co m po n e nt ID Co m p on e nt ID CV 3 2 A A O-2-8 0 A AO-2 38 2 E CV-3 3 11 CV 3 2 B A O-2-8 0 B AO-2 38 2 F CV-3 3 12 CV 3 2 C A O-2-8 0 C AO-2 38 2 G CV-3 3 13 CV 3 2 D A O-2-8 0 D AO-2 38 2 H CV-3 3 14 CV 3 3 A A O-2-8 6 A AO-2 38 2 K CV-2 3 71 CV 3 3 B A O-2-8 6 B AO-2 38 3 CV-2 3 72 CV 3 3 C A O-2-8 6 C AO-2 38 6 CV-2 0 82 A CV 3 3 D A O-2-8 6 D AO-2 38 7 CV-2 1 04 CV -20 4 6A A O-23 7 7 AO-2 89 6 CV-2 7 90 CV -20 6 5 A O-23 7 8 AO-4 53 9 CV-2 7 91 CV -14 7 8 A O-23 7 9 AO-4 54 0 CV-1 9 94 CV -79 5 6 A O-23 8 0 CV-2 38 4 CV-1 9 95 AO-25 41 A A O-23 8 1 CV-2 38 5 CV-1 9 96 AO-25 41 B A O-23 8 2A CV-3 26 7 CV-1 9 97 AO-25 61 A A O-23 8 2B CV-3 26 8 CV-1 7 28 AO-25 61 B A O-23 8 2C CV-3 26 9 CV-1 7 29

Note 1: OM N-2 8 m ay b e a p pl ie d to a ll va lv e s in t he IS T pro g ra m th a t m e e t OM N-2 8 re qu ire m e n ts in t he fut ure.

Rea so n for Re q ue st

In ac c o rda n c e with 1 0 CF R 50.55a(z )(1), NSP M is r eq u est in g ap p rov a l t o a do p t AS ME OM Co d e Ca se OM N-28, Al te rna ti ve Val ve P o sitio n Ve rifi ca ti on Ap p roa c h to S a tisfy IS TC-37 0 0 for Va lv es Not Su sc e pt ib le to Ste m-Disk S e pa ra ti on fo r th o se v al ve s t ha t ca n b e d ef in ed, ca te g o riz e d, a nd d o cu m e nt e d by e n gi ne e rin g just ific a tio n a s ste m-d isk se pa ra tio n n on-su sc ep tib le va lv e s(s).

Pro po se d NRC a me n d me n ts t o 50.5 5 a (b)(3 )(x i) will a llo w sc h ed u le fl ex ib ili ty fo r v a lve s de te rm in e d to b e no t su sc e pt ib le to ste m-d isc se p ara t ion b y sp e ci fyi ng t ha t po siti on v e rific a ti on te sti ng re q u ire d by IS TC-37 0 0 m ay be p e rfo rm ed o n a 1 0-ye a r i nte rv a l ( rat he r tha n t he 2-y e ar in te rva l spe c ifi ed i n IST C-3 70 0 ) wh e re ju stifi ca ti on i s do c um e n te d an d a v ai la bl e fo r NRC re vi ew (Re fe re nc e 1 ).S uc h d oc u m e nta t ion w ou ld b e re qu ire d t o de m o nstr at e th at th e ste m-d isk c on n e ct ion i s n ot su sce p tib le t o sep a ra tio n b ase d o n th e in te rn al d esi gn a n d ev a lu at io n of th e ste m-di sk co n ne c ti on u sin g pl an t-sp e c ific a n d in du stry o p e rat in g ex p e rie nc e, an d v e nd o r rec o m m en d a tio ns. Th is al lo ws d esi gn i nfo rm a tio n a nd p e rfo rm a nc e d a ta to b e a pp li ed i n de m o nst ra tin g th at a va lv e is no t su sc e pt ibl e to ste m-d isk se pa ra ti on.

Th e ASM E Cod e c o m m itte e s h a ve p re p ar ed C od e Ca se OM N-2 8, Alte rn a tiv e Va lv e P osit io n Ver ific a tio n App ro ac h to S a tisfy IS TC-37 0 0 for Va lv es Not S usc e pt ib le to S te m-Disk S e pa ra tio n.T h is Co d e Ca se h as no t be e n a pp ro ve d fo r u se in R eg u la to ry Gui de 1.1 9 2, Op e ra tio n a nd M a in te na n ce Co de C ase A cc e p ta bi lity, ASM E OM Cod e, Re visi on 4, De ce m b e r 2 02 1. Th is Co d e Ca se h as be e n a pp ro v ed b y AS ME a nd i s list ed i n th e App lic a b ilit y Ind e x fro m AS ME Co de s an d S ta nd a rds, a s a p pl ic ab le t hro u gh t he 20 2 0 Ed itio n o f th e AS ME OM Cod e.

Th is Co d e Ca se m irro rs t he p h ilo sop h y a nd m e th o do lo gy o f the pro p ose d NRC m o dif ic at io ns to 50.5 5 a (b)( 3)

(xi ) fo r v a lv es de te rm in e d to b e n on-su sce p tib le t o ste m-di sc sep a ra tio n.Th e Co de C ase dif fer s in th a t i t pro p ose s a 1 2-y ea r rat he r tha n a 1 0-y ea r int er va l.In a c c or da n ce with 1 0 CF R 5 0. 55 a (z )(1 ), t he rel ax a tio n o f th e pre sc rib e d in te rva ls for p erf orm in g IS TC-3 7 00 su p pl em e n ta l p o sitio n v e rific a tio n re q ui rem e n ts i n ac c o rda n c e with th e 5 0. 55 a (b )(3 )(xi ) c o nd iti on wo u ld p rov id e a n a cc e p ta bl e le ve l o f q ua li ty a nd sa fe ty fo r v a lv e s m e et in g the OMN-2 8 d e fin itio n o f ste m-d isk se pa ra tio n n on-su sc ep tib le va lv e (s).

Ful l De sc r ipt ion o f P r op ose d Alte r n ati ve

In lie u o f c om p li an c e with I STC-37 0 0, NS PM p ro po se s to i mp le m e n t th e AS ME OM Co d e Ca se OM N-28 o n the ba sis tha t it pro v id es a n ac c e pt ab le l e ve l of qu a lit y an d sa fe ty in a c c ord a nc e wi th 1 0 CFR 5 0. 55 a, Co d e s an d sta n da rd s, p a ra gra p h (z )(1 ).

Desc r ip tio n of Ba sis fo r Use Th e va lv e s c o ve re d b y th is c o de c a se a re th o se ste m-di sk sep a ra tio n n on-su sce p tib le v a lv e s with r em o te po siti on in d ic a tio n with in t he sc o pe of Su b se c ti on IS TC, in c lu di ng i ts m a n da to ry a pp e n dic e s a n d th e ir ve rifi ca ti on s m e th o ds an d fre q ue n c ie s, i n ac c o rda n c e with re g u la to ry re qu ire m e nt s.

Val ve s wi th re m ot e po sit io n ind ic a tio n wit hi n th e sco p e o f AS ME OM Co de, Su b se ct io n IST A, pa ra g rap h IS TA-1 1 00, no t sa ti sfyi ng t he sc o pe an d p ro visi on s o f t hi s c od e c a se sha ll m e e t th e v a lv e po siti on v e rific a tio n re q ui rem e n ts i n ASM E OM Co de, Pa ra g rap h IS TC-3 7 00, in a c co rd a nc e wit h reg u la to ry re qu ire m e n ts.

To c at eg o riz e a v a lv e a s no t susc e p tib le to st em-d isk se p a rat io n, th e v al ve sh a ll ha v e a d oc u m e nt ed just ific a tio n th a t t he st em-d isk c o nn e c tio n is n o t su sc ep ti bl e to se pa ra ti on b a sed o n th e in te rn a l d e sig n, se rv ic e c o nd iti on s, ap p lic a tio n s, a n d e va lu a tio n o f th e ste m-d isk c on n e ct io n usin g p la nt-spe c ifi c a nd ind u stry o pe ra ti ng e x pe rie n c e, a n d ve n do r rec o m m e nd a tio ns.

Val ve s wi th re m ot e po sit io n ind ic a to rs t ha t are no t su sc e pt ib le to ste m-d isk se pa ra ti on sh a ll be v e rifi ed to a cc u ra te ly re p rese n t v a lv e o pe ra tio n a s d isc u sse d i n pa ra g rap h 1.4, P osi tio n Ve rific a tio n T est ing Re qu ire m e nt s fo r Va lv e s No t S u sc e p tib le t o Ste m-Disk S e pa ra ti on, o f t he Cod e Ca se.

Cod e Ca se OM N-2 8 wa s a pp ro v ed fo r use b y th e AS ME o n Ma rc h 4, 2 0 21.

No de v ia tio n s fro m th e Co d e Ca se a re b ei ng p ro po se d.

Desc r ib e H ar d ship o r Un usu al Diff ic ulty NOT AP PL ICABL E

Any Ad dit io na l In fo rm a tio n (sub m issio n a tta c hm e nts liste d h er e )

NOT US ED (No Atta c h m en ts)

Pr ec e d en ts Bra id woo d St a tio n, Un its 1 an d 2 ; Ca l ve rt Clif fs Nu cl ea r Po we r P la nt, Un it s 1 a nd 2 ; Clin to n Po we r S ta ti on,

Unit No. 1 ; Lim e ric k Ge n e rat in g Sta ti on, Uni ts 1 a n d 2; Nin e M ile P o int Nu c le ar St at io n, Un its 1 a n d 2 ; P ea c h Bot to m Ato m ic P owe r Sta ti on, Uni ts 2 a n d 3; a nd R.E. Gin n a Nu cl ea r Po we r P la nt -S a fe ty Ev a lu at io n for Pro po se d Alte rn a tiv e to Use ASM E C od e Ca se OM N-2 8 (EP ID L-20 2 1-L LR- 00 5 6), d at ed S e pt em b e r 3, 20 2 1 (ADAMS Ac c e ssio n Num b e r M L2 12 3 0A 20 6 ).

Refe r e nc e s

1. F e de ra l R eg ist er / Vo l. 8 6, No. 5 7 / Fri da y, M a rc h 26, 20 2 1 / P ro po se d Ru le s
2. AS ME OM Co d e Ca se OM N-28, Alte rn a tiv e Va lv e Po siti on Ve ri fic at io n App ro a ch t o Sa tisf y IST C-3 70 0 for Va lve s Not Su sc e pt ibl e to S te m-Disk S ep a ra tio n.
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