ML20078S140
| ML20078S140 | |
| Person / Time | |
|---|---|
| Site: | 05200004 |
| Issue date: | 02/14/1995 |
| From: | Quinn J GENERAL ELECTRIC CO. |
| To: | Borchardt R NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM), Office of Nuclear Reactor Regulation |
| References | |
| MFN-018-95, MFN-18-95, NUDOCS 9502230387 | |
| Download: ML20078S140 (7) | |
Text
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s GENuclearEnergy GeneralElectac Cornpany 175 Curtner Avenue. San Jose. CA 95125 February 14,1995 MFN No. 018-95 Docket STN 52-004 (GE SBWR)
Document Control Desk U. S. Nuclear Regulatory Commission Washington, DC 20555 i
Attention:
Richard W. Borchardt, Director Standardization Project Directorate j
SUBJECT:
APPROACH TO ACHIEVE CLOSURE OFITEMS RELA TED TO THE GESBWR TAPD Refs:
1.
NEDC/0-32391 Rev. A,"SBWR Test and Analysis Program Description" (TAPD), dated September,1994.
2.
Memorandum to John T. Larkins (ACRS) from Dennis M. Crutchfield (NRC),
" Draft Safety Evaluation Report (SER) on the adequacy of the Technical Approach to the Testing and Analysis Program (TAP) for the Simplified Boiling Water Reactor (SBWR) Design", dated Nov. 25,1994.
3.
ACRS Thermal Hydraulic Phenomena Subcommittee meetings December 15 &
16,1994, and January 10,1995.
4.
NRC Meeting January 9,1995.
5.
ACRS 417th Meeting, January 12,1995.
Dear Mr. Borchardt,
GE has submitted a Testing and Analysis Program Document (Ref.1) defining de* ails of how we would complete these key areas in support of the SBWR certification l
effort. The NRC has reviewed this document and formally provided its comments in Ref.
- 2. In addition, there have been several meetings (Ref 3-5) with the NRC Staff and the ACRS to explore the comments / questions. These have been supplemented by informal i
interactions (faxes, E-mails, telecons, working meetings) to clarify the positions such that appropriate responses could be prepared by GE that would satisfy the NRC and ACRS reviewers. A pathway to this is shown in Att. I and the timing and location of each response, along with a brief statement of the comment / question being addressed, is shown in Att. 2.
We have started the process of developing responses, and the first compilation in Rev. B of the TAPD will be issued for review on April 17,1995.
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..,, n n a 9502230387 950214 i
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y 4.
2-GE expects that completion of SBWR Testing and Analysis Program (TAP) as
- described in NEDC/O-32391, "SBWR Test and Analysis Program Description". (TAPD) l and completion of the work outlined in the Attachments to this letter will constitute an acceptable technology basis for Certification of the SBWR.
i We appreciate the constructive dialogue that has led to this approach and trust you will find this an acceptable path and plan.
Sincerely yours
/
?
./
uinn, Projects Manager
(
, LMR and SBWR Programs l
l
' : NRC/ACRS1ssue Closure Process
, : List ofAdditional Work From the NRC 12/94 - 1/95 l
i I
CC:
w/ attachments:
P. A. Boehnert - NRC/ACRS I. Catton
- ACRS S. Q. Ninh
- NRC i
J.11. Wilson
- NRC I
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ATTACifiENT 1 MFN #018-95:.
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NRC/ACRS Issue Closure Process Issue Cons aM Resoludon Document identified Testing Conditions I
TAPD Rev. B 4/17/95 TAPD 11/25/94 issues m
m Rev.A NRC List TAPD-DSER Other TAPD issues TAPDRev. C MSfi 12/15&16/94 Anacw merissues Letters 2/28/95 ACRS TH y
Subcommittee Meeting Startup Process Presentation to 8/30/95 ACRS T/H S/C 1/9/95 NRC DSER Detailed Analyses Meeting Bases QDB Ready for review 8/30/95 1/10/95 ACRS TH TRACG Modelissues NEDE 32176 g
m m
Subcommittee Meeting 1/12/95 0 0"***"** >
417th ACRS Meeting TRACG Appl. Issues NEDE 32178 M
Details of Tests TEST Submittals ' ongoing h
M Safety Analysis Update 6 mos. after 33 g
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ATTACHMENT 2 MFN #018-95 List of Additisn:l Wcrk Frsm Tha NRC 12/94 - 1/95 No, item Description d
MSLB outside containment - TRACG analysis. Perform TRACG analysis for this SSAR accident with focus on containment response and PCCS purging.
3DB outside containment - TRACG analysis Perform TRACG analysis of accident.
2 For RPV, clarify timing of events leading to isolation of system. For containment, SSAR focus on PCCS purging.
3 Document "RACG time step determinction logic. (Part of item 53)
MODEL Document chimney technical basis. Document supporting data for void fraction in 4
large diameter pipes and capability of TRACG to analyze flow distribution in QDB parallel channels.
5 Develop des'.:ription on chimney technical basis developed in item 4 in TAPD TAPD Rev. C we p gu n aWa@n sMar to Rgum 2A of N32m 6
MODEL for reactor vessel and containment 7
Derivation r,f TRACG conservation equations w/ as'sumptions. (Part of item 53)
MODEL Details of assumptions and range of applicability for correlations in TRACG (Part 8
MODEL of item 53)
, Provide repUV on separator modeling in TRACG (Sections 4&5 of NUREG/CR-2574, 9
- BWR Refill-RWod Program Task 4.7 - Model Development TRAC-BWR LETTER Component Models")
'*"9" separator data vs. range of SBWR conditions during normal 10 ODB operation and trans.ients Comparison of TRACG decay heat model(used in transients in conjunctien with MODEL y
neutronics model) vs. ANS standard (1979)
Describe SBWR TRACG BOP model used in transient analysis. Justify 1':
representation of dynamic components such au pumps by control system APP elements.
Provide scaling study of CRIEPl tests to demonstra3 that appropriate SBWR 13 TAPD Rev. B parameters are properly scaled Expand scaling study to include global scaling of entire system. ThN should TAPD Rev. C include detailed scaling of interactions between loops and components.
14b Extend GIRAFFE scaling study to the late blowdown phase (starting at.10 bar)
TAPD Rev. B Develop scaling groups for individual PIRT parameters (ranked High, Medium) and TAPD Rev* C 15 compare values of these parameters for SBWR and test facilities 16 Add description of Main Steam line break to TAPD Section 2.2.1 TAPD Rev. B Consideration of medium and low phenomena - include medium ranked 17 phenomena in assessment matrix; low ranked phenomena only in checks for TAPD Rev. C existence of models in TRACG ew s esumate N scenado accounkg for equbment waHaMty and 18 TAPD Rev. B g
operator actions. Determine if any additionalitems need 19 be added to PlRT.
Clarify interaction studies discussed in Sections 4.2 and Appendix C of TAPD t TAPD Rev. C g
address specif,c questions m DSER i
n lude vessel / containment interactions as specific highly ranked phenomena in TAPD Rev. C 20 PIRT 21 Discuss PCCS purge / vent process from phenomenological point of view TAPD Rev. C 22 Separate out SRV air clearing loads as an item in PIRT for containment TAPD Rev. C i
2/14/95 11:44 AM Page1
m
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List cf Additi:n:I W;rk Frrm Tha NRC 12/94 - 1/95 l
he No.
- ltem Description u
d Add description of ATWS scenario in Section 2.2.3 and expand Table 2.3-4. For l
stability, expand Table 2.3 5 PlRT format. Include consideration of bouyancy-TAPD Rev. C 23 driven oscillations during startup at low pressure and power, but with large subcooling, include discussion of PAR interactions. Add description of performance g
TAPD Rev. C charactenstics and flow patterns mduced by PARS.
Expand discussion of PIRT tables. Add new Appendix E which willinclude a brief 25 TAPD Rev. C discussion of each parameter and the basis for its ranking.
Address phases of the transient in Section 3. Add column to Table 3.2-1 to 26 indicate for what transient the phenomena are ranked and for what phase. Clarify TAPD Rev. C discussion of what is meent by SBWR unique features and phenomena.
Prepare Qualification Data Base (ODB) report for external distribution. Review for 27 completeness, consistency and quality and upgrade as necessary. Add purpose ODB and a brief summary of the process.
'" """ "' ' " ~ E*'
28 TEST test parameters. (locluded in plan for Test Reports) lQtiantification of' correlation uncertainties. Quantify uncertainties in the t
29 correlations used in TRACG with reference to application to SBWR. (included in MODEL ltem 53) pdate detailed test objectives in Appendix A to be consistent with discussions TAPD Rev. B 30 onditions_ des 5Iption.
3'i~
pa t
TAPD Rev. B Justification of test initial conditions and range. Compare the range of parameters TAPD Rev B &
32 in the test to those expected in SBWR. Develop basis for how the test is picked up RmC "on the fly";i.e. how rate of change of parameters is treated.
Test facility design details. (included in individual test reports on the various test TEST 33 programs)
Test instrumentation details - types of instruments, locations and accuracy.
34 TEST gincluded in test reports) __
_i st pmcMum MaHs - detaHs chest loop pmconMoning aM inWadon of test TEST 35 (included in test repo_rts) 36 QA plans -included as part of test documentation.
TEST 37 Use of GIRAFFE data. Rn of GIRAFFE data in validation of TRACG.
TAPD Rev. B 38 Use of GIST data. Role c t NT data in validation of TRACG.
TAPD Rev. C Determination of TRACG hes and uncertainties. Delineation of sources of data f r quantifying bias and uncertainty in specific models Roles of separate effects QUAL 39 and integral tests in determination of overall uncertainty. (included in plan for
~~TRb odel ranges vs. Si5i/Riaiigi.~OuanliIy~r~ange o~f paraieters over which
~
-~
s am n assess vs. rang i para rs expectd in N 40 QUAL transients and LOCAs. Comparisons will be made for scaling groups identified for high and medium ranked _PIRT Scope and range of sensitivity studies. Quantify the range of sensitivity studies APP g
planned for the high ranked PlRT parameters as part of_C_SAU application.
__ l Provide vacut..m breaker white paper. Justify exemption from single failure criteria LETTER l based on demonstrated rena5ility.
2/14/95 11:44 AM Page 2
List cf Additi:n:1 Werk Fr:m Th3 NRC 12/94 - 1/95 f
item Description No.
d Debris resistant design. General concept to screen PCCS inlet from debris SSAR resulting from blowdown. (Detailed design features not part of this program.)
Justify PCCS test data range (at LOCA vs 1 hr). Comphre maximum credible PCCS TAPD Rev. B flow (limited by main vent uncovery) with PANTHER!i test data range.
. gonal tests MW NSM, H6 Indu& aWonal mst and TAPD Rev. B a
45 new test matnx in, TAPD Appendix A.
Definition of PANDA tests MS,M7, M9. Define test conditions for PANDA tests TAPD Rev. B &
based on TRACG results and engineering judgment.
Rev.C 47 GIRAFFE / Helium test objectives. Add to TAPD, Appendix A.
TAPD Rev. B Define additional GIRAFFE integral system tests. Develop test matrix and initial 48 TAPD Rev* B conditions. Add to TAPD, Appendix A.
dditional GIRAFFE analysis. Perform TRACG analysis of additional tests defined gg QUAL in item 48.
A nal ana sis. Mom MG anahsis of amonal msts 50 QUAL defined in item 45.
Justification of UCB correlation for Hydrogen. Define appropriate correlation t 51 MODEL use for condensation m the presence of Hydrogen.
Reconcile SBWR nodalization vs. tests. Review TRACG nodalization used for individual test comparisons with the corresponding regions in SBWR. Perform 52 QUAL sensitivity studies to establish appropriate SBWR nodalization,if significantly different from tests.(In Models and Correlations Report-Technical content. Modify TRACG Model LTR 53 MODEL (32176) to include iterns 3,6,7,8,11 and 29.
54 Models and Correlations Report-Production MODEL Presentation on startup process. Prepare discussion of Dodewaard startup 55a procedure and SBWR startup procedure, showing trajectory of power, pressure, Presentation flow and inlet subcooling.
55b Discussion of startup process. Prepare presentation based on item 55a.
~l TAPD Rev. C Treatment of noncondensible distribution-TRACG. Develop plan for validation and 56a TAPD Rev. B application of TRACG for noncondensible distribution.
Treatment of noncondensible distribution-measurement. Add capability for 56b measurements of noncondensible distributions in the containment renions of the TAPD Rev B SBWR test facilities.
'"'*"U'
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~*
57 ODB applicable.
~ ~
[ for the modified TRACG Model LTR for discussion with NRC Staff.D'evelop TRACG d TAPD Rev. B Develop outline for test reports. List proposed test reports. Review proposed 59 TAPD Rev. B content with NRC Staff.
_ jDevelop outlines for validation reports. List proposed validation reports. Review TAPD Rev. B 60 l proposed content with NRC Staff.
Add "roadmap" to introduction section. Include list of reports and tables of 61 TAPD Rev. B contents as an appendix.
2/14/95 11:44 AM Page 3
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Li;t cf Additi:n 1 Werk Frcm This NRC 12/94 - 1/95 l
GLOSSARY p e rDaal Descriotion APP APP = TRACG SBWR Application Topical Report NEDE-32178 i
LETTER LETTER = GE to NRC letter l
MODEL MODEL = TRACG Model Topical Report NEDE-32176 Presentation Presentation = GE to ACRS presentation ODB ODB = GE Qualification Data Base, DRF A70-00002 QUAL QUAL = TRACG Oualification Topical Report NEDE/O-32177 SSAR SSAR = SBWR Standard Safety Analysis Report,25A5113 TAPD TAPD = SBWR Test and Analysis Prograrn Description, NEDO/E-32391 i
TEST TEST = Test report for the specific facility or series of tests l
l SCHEDULE Document Submittal Date TAPD Rev. B 4/17/95 TAPD Rev. C 8/30/95 LETTER Feb-95 Presentation 8/30/95 ODB Ready for review 8/30/95 MODEL Apr-96 QUAL Apr-96 APP Apr-96 TEST Specific test report, through 4/96 SSAR 6 months following
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