ML18348A208

License Event Report 1977-050-00 Re Excessive Leakage from Containment Purge Valve

ML18348A208
Person / Time
Site:	Palisades
Issue date:	11/16/1977
From:	Hoffman D Consumers Power Co
To:	James Keppler NRC/RGN-III
References
LER 1977-050-00
Download: ML18348A208 (2)

Text

~ .

consumers

• Power company General Offices: 212 West Michigan Avenue, Jackson, Michigan 49201

• Area Code 517 788-0550 November 16, 1977 Mr James G Keppler Office of Inspection and Enforcement Region III US Nuclear Regulatory Commission 799 Roosevelt Road Glen Ellyn, IL 60137 DOCKET 50~255 - LICENSE DPR PALISADES PLANT - ER EXCESSIVE LEAKAGE FROM CONTAINMENT PURGE VALVE Attached is a reportable occurrence related to excessive leakage from a Palisades Plant containment purge valve.

David P Hoffman Assistant rfoclear Licensing Administrator CC: ASchwencer, USNRC

• NOV 21 1977

CONTROL BLOCK:

- LICENSEE EVENT REPORT I I I I I I I 1 6

• Palisades

[PLEASE PRINT ALL REQUIRED INFORMATION)

LICENSEE LICENSE EVENT NAME LICENSE NUMBER TYPE TYPE lolol-lol olol olol-lolol l411l1l1l1I I o I 3 I 14 15 25 26 30 31 32 REPOR\ REPORT TYPE SOURCE DOCKET NUMBER EVENT DATE REPORT DATE 7

@E]caN'T 8

r *I 58*I 57 w w 59 60 lol5lol~lol2l5lsl 61 68 l1lol1lsl1l1I l1l1l1l6l1l1I 69 74 75 80 EVENT DESCRIPTION lol2I I After modification to the containment purge supply valve air supply lines, leakage was I 7 8 9 80 lol3I I measured, and when added to previously determined leakage from other penetrations I 7 8 9 80 lol41 I resulted in a total local leak rate greater than 0.6 La. La was not exceeded. I 7 8 9 80 lolsl I Investigation showed most of the leakage was through the inborad valve and that I 7 8 9 80 lolsl I the outboard valve was maintaining containment integrity. Repetitive event, (contd) I 7 8 9 PRIME (ER-77-50) 80 SYSTEM CAUSE COMPONENT COMPONENT CODE CODE COMPONENT CODE SUPPLIER MANUFACTURER VIOLATION 7

@0 Isl DI 8 9 10 W 11 lvlAILlvlElxl 12 17 w 43 I cI 5 I 8 I 1I 44 47 w48 CAUSE DESCRIPTION

@Jfil I Excessive leakage apparently caused by valve not seating properly. (Continental . I 7 8 80 j Equipment/me 9220.) Pending repairs, valves have been disabled in closed position I 8 9 80

• I to maintain tight seating. I 7 8 9 80 FACILITY METHOO OF STATUS  % POWER OTHER STATUS DISCOVERY DISCOVERY OESCRIPTION

[ill]

7 8 L!J 9

I1 I oI oI 10 12 13 N/A 44 L£J 45 46 N/A 80 FORM OF ACTIVITY CONTENT 7

rn 8 RELEASED

~

9 OF RELEASE W

10

.._I 11 AMOUNT DF ACTIVITY

_N..;.../A_ _ _ _ ___..I 44 45 N/A LOCATION OF RELEASE 80 PERSONNEL EXPOSURES NUMBER TYPE DESCRIPTION IT@ 1010101 L!J N/A 7 8 9 11 12 13 80 PERS.ONNEL INJURIES ITEi lol olol NUMBER DESCRIPTION

~-N~/_A______________________________________________- - J 7 8 9 11 12 80 PROBABLE CONSEQUENCES

.El§] N A 7 8 9 80 LOSS OR DAMAGE TO FACILITY TYPE DESCRIPTION lTifil.8 9~

7 N/A 1~0~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~-8~0 PUBLICITY (I0 NA 7 8 9 80

- AODITIONAL FACTORS W,fil I (Event Description Contd) - see ER-77-38. Inboard valve was torqued tightly close~

7 8 9 80 (2)) I and tested satisfactorily.

7 8 9 80