ML17252B478

LER 76-058-00 for Dresden, Unit 2 Re During Pump Operability Testing, Core Spray System Test Valve Failed to Close Against Pump Pressure

ML17252B478
Person / Time
Site:	Dresden
Issue date:	09/23/1976
From:	Stephenson B Commonwealth Edison Co
To:	James Keppler NRC/RGN-III
References
BBS LTR 76-692 LER 76-058-00
Download: ML17252B478 (3)

Text

....,

Comrnonweallfdison*

!._. - Dresden Nuclear Fvwer Station RR, #1 .

Morris, Illinois 60450 Telephone 815/942,2920 BBS Ltr. #76-692 September 23, Mr. James G. Keppler, Regional Director Di.rectorate of Regulatory Opetations - Region Ill U. S. Nuc_lear Regulatory Cammi ss ion 799 Roosevelt Road Glen Ellyn, Illinois 60137 Enclosed please find Reportable Occurrence report number *S0-237/1976-58.

This report is b~ing ~ubmitted to your office in accordance with the Dtesden Nucleaf". Powe*r Station Technical Specifications~ Section 6.6.B.

BBS:jo

.*. ,, :E~cJ6sure cc: Director of. Inspection & Enforcement .

Director of Management Information & Program Control File/NRC .

/ .*

d\AlORl DO&lll ru COP!

... - = *--~*

LICENSEE . t:VENT REPORT - *. ., . . *. . .

. CONTROL' BLOCK: I I* I I I L.

s*

. (PLEASE'PRINT AU REQUl~ED INFORMATION)

,. 1 LICENSEE UC EN SE .EVENT

• ... *  : NAME LICENSE NUMBER _ . TYPE TYPE

• • • <@E] l<E:ILIDIRISlll 10101-10101010101~10101 14l1 111 1r1 1 10131

'7.8.9 .14 15 25 26 30 31 32 REPORT REPORT CATEGORY OOCKET NUMBER . EVENT DATE REPORT DATE TYPE. sryRIE

• . 7

@mcoN'.T 8.

I I I l1J 57 58 59 60 101s101~101~13171 61 . 68 10 69 lb I I 10171 bl 74 16 ICf*.I ~1~-111 75 "I**

80 EVENT DESCRIPTION_

~ I DURING= PVYl?P OP£RA.e1L11y T~ST1JJG) cok£' SPRAY syrre:m T£ST VBLV£

• rno ;i.-1

• 7 8 9. . .. . ' . . . . . 80.

• 71olal8 9,. l14-0~-4E FAIL£P To CLos~ AGlflNsr Pump . PRe-ssURE. TH£ VA.'-vR C..LOSEP, SAits~ I

. . . - . . 80.

• • lo141 lfAcToR1Ly AFTER TH£ rump wAs SECURED. IHE EveNT HAO M1N1.mAL SA~ETY . I 7 8 9. . . . . . so-

- lol51 -, S!G-N,IF(CANCE

.. -** 7 8 9*. ... . .

SINCe"THe 1?EPVNPANI CORE SPRAY- LOOP WAS 0PERA8bE: JN ADDI-I

. 80

. (QTu1 -r1oJJ "TO *'T'J £ 11

ND "B P I S IH VALV IN T. LJDS£

7 8 9 SEE . A TTACHJ> SHEET_

• 80.

SYSTEM* CAUSE COMPONENT

• COOE CODE COMPONENT CODE . MANUFACTURER ' VXJLATION

.*ffilZ] Is* 1F I LE.J I y I A I L. Iv I£ IX I 1-P I r I <=t I5 I . lt{J

.*.:.. *. . 7 8 9 10 . 11 . 12 17' 44 47 . 48 CAUSE DESCRIPTION

~

. .7 . 8 9 I THE r:ArLVRE wBs APPARENTLY CAUSe:p *ay 1uAp~ovArS:,LUBR.1cAr10N OF THC:

I 80 .

'.' lolsl lvA&YE' STEM. Tf./£. TORQUE' SW!TC.H sctr1NG:S ON THE" YALV£ 01'£RlrrOR W£R~I *

' . -, ' : 7. ' 8 ~ . . . . . . . ' . .' .. . . . ., . ' - .. . . . ' .. .' - . *. - 80 . *

~;,'._::<J1l_oj lve:s1E1e:D TO J}E CORRECT. '-THE VAL.NE STEM WAS LOBRICAT~-' AND Pt~ VALVE w~sl

' .7 ' 8 9

• ., - . *. - FACIUTY .

• METHOD OF

' ... ' -. 'l.; (5E£,4:ATTflcH£D

sHE:E:r

• ,/

• 1 . . '~80.. .

STATUS 'l!. POWER OTHER STATUS . DISCOVERY * . :: .* DISCOVERY. DESCRIPTION

[ill]

• lfil lo 171 *OI12 _13I NA I

• Im .__I-,--..M..:....:.~--" . . . _.--~---_,__~-.JI 7 B 9 FORM OF 10 44 45. *.46 80 ACTIVITY CONTENT RaEASEO OF RELEASE AMOUNT OF ACTIVITY * -* LOCATION OF RELEASE

.(ill] **

• 1.~J *1£] . _ _ I _ ._ _ _ _ _ _-"-Mo.,;-'.4...,.....,._ * . __,;.,* __.I

• I NA**

7 B . 9 10 . 11 . 44* -

• 45 80 '

.PERSONNEL EXPOSURES lO ro IOJ

.

• NUMBER TYPE

• DESCRIPTION

[!J~J ~ .,_ _ _ _M_*J't____________--.....-____________I 1: 8 9 . 11 . . 12 13 80

.*.**: _. ... *PERS.ONNEL INJURIES *.,*.. .

• . NUMBER . DESCRIPTION . *

• f,

-' ' 7~8 910101or11 12-'-~**~-*~-----~-------~---~t, 80 .

OFFSITE CONSEQUENCES .

.filfiles

• *** *... 7-*.

Ji1 80.

. LOSS OR. DAMAGE TO FACILITY

. : . - . TYPE DESCRIPTION ..

• . **...7.EEB 9gJ* .

. *1~-*_N_ttt_ _ _____;.. _ ___,,_______--'--------'"--------~'.-:

. 10 . . .* 80 '\

,** PUBLICITY

(!ffi /JA.

7 *a 9 80 AODITiONAL FACTORS

~.I -rHI~ £V£.NT WA~ /NJrlALLY CJ..A!;~/Ft£D AS A NQ!J-R£POR1fiB&£ occuR-1 *

- 7 B 9 . 80

. *.* ... * @fil "R£NCE .. . A F-t6r<.* N-S I IE REVIEW OF' G R£PC>f<T

• .. -7 8 9 '*. .

NAME: .:J* /<O L fl N 0 W SI<.. I . PHONE: ...... E._.'<T.

- -* i'.*~i!!>...~ :__!_~~i. _-.:_ _*_ ______:.:.:;.:.:.:~.. .' . . '*

--*---~***-**~-~-- ---**

'*"41 EVENT DESCRIPTION (Continued) position after the puinp was shut ~own to ensure the integrity of the core spray injection path.to the vessel. Several core spray system.test valve failures have occurred at Dresden. (50:-237/1976-58)

CAUSE DESCRIPTION (Continued) operated successfully four~times against system pres~ure.

~program is underway to establish an operator~' lubrication cr~w to keep up with plant lubrication requirements. This preventive maintenance program will help to eliminate valve failures ~hich result from a lack 6f lubrication.

MO 2-1402-46 is a Crane 8-inch globe valve, operated by a Limitorque SMB-0 operator.

ADDITIONAL FACTORS {Continued)

• .

• discussions with NRC, the event was reclassified as*a Reportable Occurrence on 8-25-76.

\: ~ .

,*. -*