ML18037A176

LER 79-014/03L-0 on 790319:during Refueling Outage,Core Spray Sys Snubber 40-HS-10 Found Inoperable.Caused by Worn Piston Seals on Core Spray Snubber Resulting in Loss of Fluid from Snubber.Seals Replaced & Snubber Reinstalled

ML18037A176
Person / Time
Site:	Nine Mile Point
Issue date:	06/14/1979
From:	Duda E NIAGARA MOHAWK POWER CORP.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML17053A731	List: ML17053A730 ML18037A176
References
LER-79-014-03L, LER-79-14-3L, NUDOCS 7906220408
Download: ML18037A176 (2)

Text

LICENSEE E'IJ'E NT REPORT

• CONTROL BLOCK:

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(PLEASE PRINT OR TYPE REQUIRED INFORMATION)

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7 8 9 N Y N LICENSEE CODE M P 1 14 ps 15 0 0 0 0 0 LICENSE NUMBER 0

25 Qs 26 LICENSE TYPE JO 57 CAT 58 Qs CON'T

~01 R'RE ~LQB 0 5 0 0 0 2 2 0 7 0 3 1 9 7 9 6 0 6 1 68 69 EVENT DATE 74 75 REPORT DATE 80 7 8 60 61 DOCKET NUMBER EVENT DESCRIPTION AND PROBABLE CONSEQUENCES QIO Durin refuelin outa e a Core S ra S stem snubber 40- - a

'o be inoperable. This resulted in minimal safet im lications.

~Os

~00

~os 4 80 7 8 9 SYSTEM CAUSE CAUSE COMP VALVE CODE CODE SUBCODE COMPONENTCODE SUBCODE SUBCOOE

~OS ~SF Qr ~E Qro ~B Qrs 13 S 0 P 0 R T 18 Q14 ~0 19 prs LZl Qls 20 7 8 9 10 11 12 SEQUENTIAL OCCURRENCE REPORT REVISION Q

LFRIRO ssrosr EVENT YEAR

~79 21 22

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~01 24 REPORT NO.

4 26

~W 27

~03 28 ATTACHMENT CODE 29 NPR~

TYPE

~L 30 PRIME COMP.

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31

~0 NO.

32 COMPONENT ACTION . FUTURE EFFECT SHUTDOWN TAKEN ACTION ON PLANT METHOD HOURS 022 SUBMITTED FORM SUB. SUPPLIER MANUFACTURER Qls ~Z Qrs ~~Q20 +~Per 0 0 0 0 +N Poo ~NQ)4 +A Pos I 2 0 7 Qos 33 34 35 36 37 40 41 42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS 27 o Worn piston seals on Core Spray Snubber 40-HS-10 caused a loss of fluid from the snubber thereby making it ino erable. The seals were re laced the snubber was tested for operability, and it was reinstalled. This 3

resulted in minimal safety implications.

4 80 7

s 8 9 FACILITY STATUS H Oos ~pos 0

% POWER 0 0 OTHER STATUS NA 0 METHOD OF DISCOVERY

~B Q Snubber DISCOVERY DESCRIPTION Q32 Ynspectron 8 9 10 12 13 44 45 46 80 ACTIVITY CONTENT Q

7 8

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RELErrLSED OF RELEASE 9

033 10

'034 EXPOSURES AMOUNTOF ACTIVITY 44'ERSONNEL 45 LOCATION OF RELEASE 036 80 7 8 9 11 12 13 80 PERSONNEL INJURIES 0 ~0lf 0 Q40 NA 80 7 8 9 11 12 LOSS OF OR DAMAGE TO FACILITY 43 VOO63BOPC7$

9 7 8 9 10 80 O

ISSUED

~N044 PUBLICITY DESCRIPTION ~ NRC USE ONLY 7 8 9 10 68 89 80 o NAME OF PREPARER E. Duda PHDNE.(315) 343-2110 Ext. 1306

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