ML20206G550

SER Supporting Employee Concern Element Rept OP 30501, Accessibility Problems

ML20206G550
Person / Time
Site:	Sequoyah
Issue date:	11/04/1988
From:	NRC OFFICE OF SPECIAL PROJECTS
To:
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References
NUDOCS 8811220312
Download: ML20206G550 (3)

Text

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NUCLEAR REGULATORY COMMISSION i

I.- M'5 W ASHINGTON. D. C. 20688 Yff StJE'Y EV LUATION REPORT Fv TPE OFFi E OF SPECIAL PP0JECTS 1

EypLnVEE CetCERN ELEvENT REDORT OP 30501, "ACCESS!RILITY PROBLEWS" TENNESSEE VALLEY AUTHORITY SEOUOYAu NurLEAR 90'4ER PLANT llNITS 1 A 7 l

t DOCKET N05. 90 3?7 AND 50-328 I

I.

Sutje:t Catege y:

C;e-ati:ns (30000) 4 S;:: ate;: y:

1::essibility (30500)

Ele en.:

A::e s sidi11ty Pr:51 ems (30501) l In : asis fer Ele eet Re: rt CP 30501-SQN, Rev. 4, dated March 12, 1957,

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l are the foll w ; e pic>ee cen: erns:

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Cenetr. IN 525-159-C01 WE'io Unit 2, ence scaffolding is re eved, scee i

valves would be hard to get to, e.g., 15 feet I

eff fleer, to manually open or clese valve.

i CI :culd not provide specific valve rumbe*s, l

i systems, buildings or elevations. CI stated this

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i c 9ditiori exists throsghout the plant.

i 0: :e n IN-55-IS?-002 Valves lo:ated in WE'.P Unit 2 South Valve Roem l

are sery cengested and ina::essible.

Only a j

1 s all person weald be able to get to them.

CI l

stated one example is Orain Valve on Main Steam l

System in South valve R::m Unit 2.

CI could not i

provide any additional details, i

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Cen:ern I'-55-3CE-001 Varicus equipment that could be needed during an l

emergency is net readily accessible to applicsble L

pers:nnel.

Example:

Auxiliary Bufiding 713' Elev (also Contain ent Building) the instrument l

j ranels and the auxiliary feecvater pu ps art se 1

congested it is very time consuming to get in l

t*ere to read the instruments.

Nuclear Power l

C:n:ere.

Cl has no further inferratien.

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t I

C:*:e-r Pi-55-C03-0C6 Watts Bar Instrutentation is not properly i

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cesi;aed for a::essibility.

CI tas ro re-e t

a::iticnal information availaole.

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l C: :e-r :'-55-22C-0C1 Le t:

en:essive re-te-cf hangers a':

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n L-t 2

Rea:t:r E.41: c;.

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,5 :s ;m e s (

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G811220312 881104 PDR ADOCK 05000327 c:eraticns are anti f: Ated.

Cl f eel s tra*. P:t i

P PDC ea: ;n ::a:ern was sr:an regar:ing tre nWT:er Cf l

l haagers teing used.

COnstru tion cepart*ent f

2 concern.

CI could not provide any additional details / specifics.

Con:ern IN-55-617-001 The building of hangers & pipe support systems to the point of accessibility being made impossible.

This concern involves eoth units 1 & 2.

The primary places of interest are: roof, Auxiliary Building elevation 737, the ERCW vent valves, CCS valves to heat exchangers, number 4 accumulator room, north & south steam valve rooms & elevation 713, boron injection tank (BIT) room. Accessi-bility is nonexistent due to potentially hot pices & congested areas.

Presently there are scaffolds to some inaccessible a r e a *., when scaf folds are removed, no access will be avoil-aule.

C:r.;e-n RII-56-A-0116 The alleger stated that at Watts Bar and

• ec; > ah, control parels or stations are chysi-cally located such that there is no way to get to the-to crerate the emergency equipment.

As an example, a panel was observed to be located six to eight inches from a wall, facing the wall, so that tnere was no physical way to even r sad the tags 09 the panel.

The alleger said that there were a "lot" of ankwardly located panels a',

Watts Bar.

9 N:te:

5;N elevati:ns are 23 feet telow tr:se a,t kBN. SQN main stcam valve ro: s are situated east and west.

Tne first six e cloyee concerns listed above were specific to Watts Bar N;;1eae Plant 'hBN), but eval;Ated oy TVA as generically applicable to 5;N. Tre severth employee concern was specific to Coth WBN and SON. Feur

f the sesen employee ccccerns were evaluated by TVA as nuclear safety t

relatet.

i II.

5;.--ary of Issue i

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1.

Concern IN 55-159-C01.

Val <es recuiring manual operatien woul: te cifficult to access if scaffolding isn't installed.

i 2.

Ccreern ;N-i5-159-002.

Valves ic:ated in SON east and west valve c::ms are c:rgeste: and inaccessible, f

3.

C: :e n !N-56-3 6-:01 Ecui: ent reece: curing an e ergency is c4'ficult to access for applicaole person e1.

j C:a:e -

--55-::3-026, lastr. entatier is c:t ces4;ae f:r r

f.-

.,e : :.: ;

.e e.:ess4,e a ;e-i*stallati0a ir t*e ria*t0r OJil0ir; may ca.se ALARA : n:er*s caria.g p' ant C;e'aticas.

1

3 6.

C:n:ern IN-85-617-001.

A:cessibility to equipment has t;een made

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alm:st impossible in several plant areas at SQN due to installation of hanger and pipe support systemt.

7.

Cen:ern RII A-0116.

The physical location of control panels and stati:ns at SCN prevent, in seme cases, personnel access for c;erati:n in e ergen:y situations.

Evaluati:n Because cf the conspe:ific nature of the first six employee concerns and l

their relative similarity, TVA addressed these by evaluating:

(1) the i

progra at SON for icentifying and ccerecting access problems, and (2) access pr:blems in plant locations specifically referenced in the state ents cf the employee concerns.

TVa perfer e a spe:ific evaluation of employee concern R11-86-A-0116 tecause it was ad:ed to the ele ent report af ter the original six con: erns aert initially evaluated.

TVA terfor e: walkde.ns to evaluate the accessibility of equipeent for c:e-ati:n (caring nor al, off-normal, and emergency conditions),

maintenance, and testing in plant locations specifically addressed in the su Je:t e pl yee cen: erns.

The persent el sefety aspect of equip ent l

i a::ess was also evaluated.

Control stations and components requiring j

1e:al ::eratien under other than normal conditions were identified the malideon progra. by revie,< of SQN emergency iastructions (Els), abnormal irsteu:t ers (ACIs), and function restoration guidelines (FRs).

i

eratir; TVA also to:( crecit fer the ECP Validation and Verification program I

cercu:te: at SON in March 1956 in their evaluation of the accessibility of I

e ergea:y equip ent requiring local operation.

Irterdeas with SCN eperators were conducted to identify any pecblems with L

I access to local control stations for emergency equipment.

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IVA c:a:1ude: that a::ess to certain areas is a pr0blem at SON; therefore, l

ea:n of the e ployee cencerns is valid to some extent, However, emergency f

e:vir eat is accessible and acequate, and proper enintenance can t:e

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a::: olisee:. SON is sensitive to snis issue as illustrated by past, as j

well as engeirg, icentification and correcticn of a: cess proclems.

Alt m ;h the current program is less cefined than in the past, it appears to be effectise in identifying and correcting access problems.

No i

safety-related ceficieacies were identified by TVA in this evaluation.

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t The MC staff telieves tnat tne TVA investigatten of the ::r:ern was 1

ace:Jite, arO t*eir resclution of the concern as descrited in Ele ent

'e::rt C; 20E01 is a:*ertatle f r restart.

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