ML20058F914
| ML20058F914 | |
| Person / Time | |
|---|---|
| Site: | Calvert Cliffs  |
| Issue date: | 11/05/1990 |
| From: | Denton R BALTIMORE GAS & ELECTRIC CO. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| NUDOCS 9011090215 | |
| Download: ML20058F914 (4) | |
Text
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ISALTIMORE a'
OAS AND 1
ELECTRIC
-s.
CHARLES CENTER e P.O. BOX 1475
- BALTIMORE, MARYLAND 21203 1475 n L DENTON OtNCRAL MANAOf R CALVERT CLFFS November 5,1990 t'
y U. S. Nuciar Regulatory Commission Washington,DC 20555
- NITENTION:
Document Control Desk'-
m
SUBJECT:
' Calvert Cliffs Nuclear Power Plant -
Unit No.1; Docket No. 50-317 Fire Barrier Penetration Special Report Technical Specification 3.7.12 ACTION reauircment a n
. Gentlemen: '
}
-Per the requirements of Technical Specificakion 3.7.1'2 ACTION requirement a, we hereby submit
_ the attached Special Report concerning an inoperable fire barrier penetration, specifically fire door :
? #401-- between the Turbine Deck and the Control Room would not latch properly 'and.was
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inoperable for greater th:n 7 days.
- Shoukt you have any further questions regarding this matter, we will be pleased to discuss them with
} you..
Very truly yours, M
~
RED /CRS!bjdi NRC 90116 f, L 1 -
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, R; A. Capra, NRC
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7 6-t yp' " .:, c " ~ - o ATTACIIMENT (1) '7 i+ PENETRATION FIRE HARRIER SPECIAL REPORT m 7 l ( f. / BACKGROUND yy li . On October 2,1990 it was discovered that fire door #401 located between the Turbine Deck and the w ff LControl Room would not latch properly. As a result the door was declared inoperable and ACTION .s l.3 . requirement. a of Technical Specification (U) 3.7.12 was entered within 1 hour. This ACTION i e:. ; requirement requires verification of the fire detection operabili_ty on 1 side of the barrier and a j
- hourly fire watch patrol which was performed while the door was inoperable. The latch mechanism e'
H was repaired and the door was declared operable on October 11,1990. The ACTION requirement j m <m,m/ was then exited. The door was inoperable for 9 days. 1 i t': MJy s To fulfill the!ACrlON requirement of E 3.7.12 a Special! Report is to be prepared for thc l ~4 r Ng c 1 @ L.W ' Commission when a barrier is inoperable for.7 days or more. This Special_ Report, pursuant to gn "A ' l TS'6.9.2,'is to' outline actionf % ken, the cause of the inoperable penetration and plans and schedules : k ((T .to restore hc penetration to operable status. The information contained in this document fulfilis! + y, ,.4 a R y !.Ibic c thes,e rcquireme, nts.' ,u ,,6 5 " V/k <' b e.. ? ;, vm 1 o s 'f ;l ll:Yh ccm :g[ m, ? ,:\\ 7 1 a
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- EFFECT ON UNIT OPERATIQN Jj Mg A
..wi ' #l 4 ^ %yMEfj V f.(Upon discovery.that the latch mechanism on Fire Door #401 was not working properly thy f y j ~ nu-,., ? + l5@hf. S@Vde'laredlinoperahic and;the appropriate TS ACTION requirement was entered. This j c A; 1 ,,'*r ,,~ ..<r:f. .,,,h* ^
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- common to both Units.? Unit 1/was, in MODE 3 (HOT STANDBY) aral Unit 2 was defueled when-a N
6 % s g:g y i n y ht? tM.,..... J. 3 M 7l$p:.j&e%l,, r, the door, was declared' inoperable. Unit 1 was in MODE 1 (POWER OPERA
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+, ,t, gg; 'g,4 oj..f,, > still'defueled when'the' door was returned to service?TS 3.712 ' Action b specifically states that the ? J
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. provisions of TS 3.0.3 an 3.0.4.do not apply. .+ yn,W, .'~ ^ V jg s,.% m.s ( $ [QWhje"ths door.was inoperable the affect o'n fire protection was mitigated by the follo'wingij
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.c t .m-y3.. , %P ATTACllMENT (1) , 1 l + , ~., PENETRATION FIRE BARRIER 4, .7 SPECIAL REPORT 8 y ~i .g Ef s 4 5( .L The' door itacif was closed, only the latching mechanism was disabled. 'A door in the ek> sed u ,s l,d position is still capable of providing a high degree of fire resistanccc j e[J y thp ,.l cThe Turbine Deck side of the door is shicided by a concrete vestibule. This would protect ( w, 4 j
- the door from direct exposure to a fire on the Turbine Deck..
1 j e w a .,,o b e i n: sThere is a, second set of doors between Fire Door #401'and the Control Room. This second - i n :t -. k . ~ +% ,a % l " 9 :. ~sei of doors is substantial in construction and ' access through the doors is controlled.' l WU,,? f.Ther$ fore, it was unlikbly the Control Room could have received any fire exposure. ] x W ,,- 4 a, .jM i 4 u
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t } 3 k MF ' b [TASKSTO ASSUREIVrURE COMPLIANCE ~ mp:/ s3 : g's,, e s.- . A,/ 1 W ~ .,i $4. t 9 - EFircJDoori#401'is one of the most heavilyJused doors at,Calvert Cliffs Nuclear Power Plant i [.,n. x-- b, ) ' !M . $.e 4 %,, @m @..]CCNPPp Fire doors, duc to their. weight,:will have components' wear or break on occasion when 4 .a _... _,. m. s t, .g c g Q @ Q, rubjected to'this level of use/JSince this is a Safclty Related door, parts to repk d' e ss g w@n :p?.. S ":"obtained.".The latch was repaired and the door declared OP s ,1 .o y& + y n c v, N .f ) %.p-il ? r.. - 't ,, f. [ c m. !' 4 n 6 s m u< .j h$ Mb.n } Thbsel doors! credited as' Penetration FirclBarriers per TS 3.7.'12i refinspectcion~ anIl8:montil
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avy.. m y d;jMg;,, f.m 4 frequency by a Surveiflance Tc'si and on a six month frequency by a Performance Eval M, .u, 4r hh,i k linsthi6n frequency is adequate.:l wen concerns rega~ ding doors arc'noted betw I r eo .m ~ - gw x [o %;kh [k, 9 thcy arc' ' addressed vdtn CCNPP Probic_m Report process 3 ' S ~. ~ p h, h u!hb :W < * ~ ;. 8 M m o - ' gla . O-b L- [f., n c I m . c % 4 s..,/u.. ' { '.'. - 1 P; ',. '.,i I o r ; 'l,' g ;q d r*'w;ij}:ijff ., * ' y' t r f I <e ~ m, r s, l A '. 18, ' y, ;p a l' ^ m m s [.[t S 'I i y% &.,Sp - i -If 4 a W p',n 't 0 ji:' u k k\\l:f, h b = <h.1 o .y , ) -- 4 M, M, c - 1 -i >+, flqgy <Q %m a ' A ,.a Dhppg a. .. P b.; 1 pH gg.y Q, '4 %,, -' b
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