ML18139B096

From kanterella
Jump to navigation Jump to search
LER 81-016/03L-0:on 810119,at 100% Power,Positive Pressure Greater than 0.05 Inches Water Could Not Be Maintained in Control Room.Caused by Deteriorated Seals on Door to Control Room Complex.Defective Doors Repaired
ML18139B096
Person / Time
Site: Surry Dominion icon.png
Issue date: 02/18/1981
From: Joshua Wilson
VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML18139B095 List:
References
LER-81-016-03L-01, LER-81-16-3L-1, NUDOCS 8102260535
Download: ML18139B096 (2)
v • d • e


Text

366 ~ u:

  • ,re e

~R-C FC'..,~M S. NUCLEAR REGULAiORY COMMISSION 1,-,7)

LICENSEE EVENT R~PORT CONTROL BLOCK; ... \ -~~-~-------e! q .~ ./

(PLEASE ~RINT OR TYPE ALL REQUIRED INFORMATION)

~0 I J kV ! ~l~E~s!= ~joES I ~J0\s OI OI ~ I OLc~~sE0JuM~lR OI -l-;': 0:1L,,.,~l0b64 I ~1de~sE! ;}E \j0157 J© 1

c~T CON.7 ~ - , \'*.-,.(}J?

~

r;-r-::-1 5

~~~~~ L..!::J© lo i s Io Io Io 12 !8 11 101 o. 11 _ 1 _i ~~ i ' ?* 1s I 1 _I© l o I 2 I 1 ~ ~ J_ s I 1 1 G).

60 61 OOCKETNUMeER \(_ SS 6!? *:::~*<Vc:N,DATE ,4 ,5 RE?OR,;:,,__,~ 80

V:~-i: DESC:=!IPTION AND PROBABLE CONSEQUENCES@ - _- . ;;_ :

I On January 19,1981, with Unit No. 2 at 100,~ *pq,;~er, a positive pressure of greater

[2J}J than 0.05 inches of water, could not be maintained in the control room. This is

~ I contrary to T.S.-3.19.A and is reportable per T.S.-6.6.2.b(2). The control room

!]JI] I emergency ventilation system was operable, therefore. the health and safety of the ITEJ I public were not affected.

I0 iE I 80

'  !!  !? SYSTEM CAUSE CAUSE COMP. VALVE

[IIT) 7 8 9 CODE 10 COOE IS! G!@ L!J@ ~@ , x , x , x , x , x , x 11 SUBCOOE 12 13 COMPONENT CODE

,e 1!!

SUBCOCE w@

19 SUBCOOE w@

20 SEQUENTIAL OCCURRENCE REPOR"T REVISION REPORT NO. COOE TYPE NO.

w LE!'l/RO ['.VENT YEA.A

@ REF'ORT NUMBER I ! 11 8 I I !Ojlj6j -1.,..., !Ol3j [QJ 21 22 23 24 26 27 28 . 29 30 J2 AC7iON FU,\.JRE :F;:ECT SHUT;:)OWN (.;:;\ ATTACHMENT NPR~ PRIME COMP. COMPONENT

,AKEN ACTION ON F'l-ANT METHOD HOURS ~ SUBMITTED FORM :iUB. SUF'PLIER MANUFACi"UAER l.!...J@LLJ@

33 34 W@

35 W

36 lo Io Io I o40I 41W@- LEJ 37 42

  • l!J@) !x 19 !9 !9 I 43 44 4i CAUSE DESCRIPTION ANO CORRECTIVE ACTIONS @

I The seals on the doors to the control room complex were deteriorated. The defective o::IIJ I doors -were repaired.

o:EJ8 7 9 80

AClLITY STATUS  % POWER OTHER STATUS

'JO'

\:.:::J METl-100 OF DISCOVERY DISCOVERY OESCRlf'.TlON A

'5' tITIJ L!J@ I ll 01

  • Ol@I N/A j ., L£J@I...._S.._pe_c_i_al_T_es_t_ _~_ _ _ _ _ ___,L"*. .

'J 8 9 lO 12 1"3 44 45 46 BO ACTIVITY CONTENT C\ . ~

RELEASED OF RELEASE AMOUNT OF ACTIVITY ~ . _LOCATION OF RELEASE

'[QI] W@ LIJ@I N/A

, a*s . -10 11 *44 45 60

?ERSONNEL EXPOSURES r::;:;..

_*:, ;1, 1 1 a , o , o I\IUMBEA

,~w@-_____

(;:;\ TYPE DESCRIPTION N;;,;.:/__A_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _...;

a ea 11 12 ,:i so

?ERSONNEi.. lNJURIES Q LW IO

~UMBER IO OESCRIPTIONO

! 0 l@....__________li___~ __A_ _ _ _, _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ ___.

a s 11 12  !!O

\.OSS OF OR Q,l,MAGE TO FACILITY r;::;-,

~ I Zl~ .......---*______________N_/A_______________________________________,

TYPE DESCRIPTION \;:;;)

, a 9 10 BO PUBLICITY I'.:':\ NRC USE ONL y IITIJ L!Jei _____-________1'=~1__A__. _ _ _ _ _ _ _ _ _ _ _._.

ISSUED~ DESCRIPTION~

.rr*i, ,., , , , , , , ,: _ -".

, e 9 10 66 59 BO ;

J. L. Wilson  :,'"'~'!:: CSQLi) 357-3184 . ,, ~-

ATTACHMENT I e

SURRY POWER STATION, UNIT 2 DOCKET NO: 50-281 REPORT NO: 81-016/03L-0 EVENT DATE: 1-19-81 TITLE: EXCESSIV(_E CONTROL ROOM LEAKAGE

1. DESCRIPTION OF EVENTS:

On January 19,1981, with Unit No.2 at 100% power, MOP-21.3 was performed to verify the integrity of the Control Room pressure boundary following the breaching of the boundary. A positive pressure, of greater than 0.05 inches of water, could not be maintained in the control room.

2. PROBABLE CONSEQUENCES and STATUS of REDUNDANT EQUIPMENT:

The requirement of 0.05 inches of water insures that the integrity of the control room is such that the bottled air system will prevent the in leakage of radioactive material for a period of one hour during a LOCA. The emergency ventilation system was operable and the control room pressure boundary was returned to a satisfactory condition within the 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> Tech. Spec. time limitation. Therefore, the health and safety of the public were not affected.

3. CAUSE:

The seals on the doors to_ the control room, battery room, and No. 2 cable vault had deteriorated due to excessive contractor usage while ._performing Fire Protection and THI Modificatians.

4. IMMEDIATE CORRECTIVE ACTION:

Verified the emergency ventilatioµ system to be functional. Initiate an investigation to determine the source of leakage.

5. SUBSEQUENT CORRECTIVE ACTION:

The defective doors were identified and repaired.

6. ACTION TAKEN to PREVENT RECURRENCE:

The continued performance of the MOP and frequent use of the check list for door

eals will minimize the length of time inadvertent damage goes undetected.
7.
  • GENERIC IMPLICATIONS:
  • None.

I

Retrieved from "https://kanterella.com/w/index.php?title=ML18139B096&oldid=2504896"