ML20206G550

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SER Supporting Employee Concern Element Rept OP 30501, Accessibility Problems
ML20206G550
Person / Time
Site: Sequoyah  Tennessee Valley Authority icon.png
Issue date: 11/04/1988
From:
NRC OFFICE OF SPECIAL PROJECTS
To:
Shared Package
ML20206G037 List: ... further results
References
NUDOCS 8811220312
Download: ML20206G550 (3)
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Text

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/p' %9'c UNITED STATES l'

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  • NUCLEAR REGULATORY COMMISSION i

$ I .- M'5 W ASHINGTON. D. C. 20688 Yff StJE'Y EV LUATION REPORT Fv TPE1OFFi E OF SPECIAL PP0JECTS EypLnVEE CetCERN ELEvENT REDORT OP 30501, "ACCESS!RILITY PROBLEWS"

! TENNESSEE VALLEY AUTHORITY  ;

SEOUOYAu NurLEAR 90'4ER PLANT llNITS 1 A 7 l t

I DOCKET N05. 90 3?7 AND 50-328 I. Sutje:t 4

Catege y: C;e-ati:ns (30000)  !

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, }

l are the foll w ; e pic>ee cen: erns: i 1 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 {

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

i

' 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

ranels and the auxiliary feecvater pu ps art se j 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. I 1 t I

i C:*:e-r Pi-55-C03-0C6 Watts Bar Instrutentation is not properly i cesi;aed for a::essibility. CI tas ro re-e t f

a::iticnal information availaole. , },

l C: :e-r :'-55-22C-0C1 Le t: en:essive re-te- cf hangers a': i

:.e : :.:  ; n L-t 2 Rea:t:r E.41: c;. t j +::i: : .. 1::. .'at:- -::- n.-:n- *

, -ea'.' l

mns) c.

' ,5 :s ;m e s ( .  ; : aM

. G811220312 881104 c:eraticns are anti f: Ated. Cl f eel s tra*. P:t t

, PDR ADOCK 05000327 ,

i P PDC ea: ;n ::a:ern was sr:an regar:ing tre nWT:er Cf l haagers teing used. COnstru tion cepart*ent l 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.

II. 5;.--ary of Issue i i

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  !

) 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; I

TVA also to:( crecit fer the ECP Validation and Verification program 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. l>

1 [

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 (

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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'. V . - .' siar C0a:

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1 The MC staff telieves tnat tne TVA investigatten of the ::r:ern was ace:Jite, arO t*eir resclution of the concern as descrited in Ele ent

'e::rt C; 20E01 is a:*ertatle f 0r restart. I I

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