05000237/LER-1978-051, Forwards LER 78-051/03X-1

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Forwards LER 78-051/03X-1
ML17173A379
Person / Time
Site: Dresden 
Issue date: 10/17/1978
From: Stephenson B
COMMONWEALTH EDISON CO.
To: James Keppler
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML17173A380 List:
References
78-1376, NUDOCS 7811240210
Download: ML17173A379 (2)
v • d • e


LER-1978-051, Forwards LER 78-051/03X-1
Event date:
Report date:
2371978051R00 - NRC Website
v • d • e

text

Comm9'ealth Edison Dresden Nuclear Power Station R.R. #1 Morris, Illinois 60450 Telephone 815/942-2920 BBS Ltr. #78-1376 James G. Keppler, Regional Director October 17, 1978 Directorate of Regulatory Operations - Region III U.S. Nuclear Regulatory Commission 799 Roosevelt Road Glen Ellyn, IL 60137 Reportable Occurrence "Update Report" #78-051/03X-1, Docket #050-237 is hereby submitted to your office to supplement Licensee Event Report 78-051/03L-0 concerning the failure of valve 2-1601-24 to operate in the specified time limit. It addresses only a change in the Cause Code classification (item 12) from X to E and a change in the Cause Subcode (item 13) from Z to B.

This event was reported to you under Dresden Nuclear Power Station Technical Specification 6.6.B.2.(b), conditions leading to operation in a degraded mode permitted by a limiting condition for operation or plant shutdown required by a limiting condition for operation.

BBS/deb Enclosure oLcm~

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.B. Stephenson tation Superintendent Dresden Nuclear Power Station cc:

Director of Inspection & Enforcement Director of Management Information & Program Control File/NRC

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LICENSEE EVENT REPORT A UPDATE REPORT -

PREVIOUS

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.REPORT DATE:

10-02-78 CONTROL Ei'LOCK: I I I If,'\\

(PLEASE PRINT OR T-t'PE All REQUIRED INFORMATION)

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! LICENSEE CODE 14 15 LICENSE NUMBER 25 26 LICENSE TYPE JO 57 CAT 58

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60 61 DOCKET NUMBER 68 69 EVENT CATE 74 75 REPORT DATE 80 EVE~T DESCRIPTION AND PROBABLE CONSEQUENCES@

I wtlile performiFg surv. DIS 1600-11 (Press. Suppression Air Oper. Vlv. press sw. setptJ I

ck.) valve 2-1601~24 failed to operate in the specified time limit required by T.S.

i 4J7.D.1.a, Table 3.7.1.

Safety significance minimal because redundant (inboard) iso-1 i

lation valve was operable and would have provided containment integrity within spec-I ified times as required.

This is* the first occurrence of this type at Dresden.

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CAUSE

CAUSE COMP.

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REPORT

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LER/RO CVENT YE~.R REPORT NO.

CODE TYPE

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ATTACHMENT NPRD-4 PRIME COMP.

REVISION NO. w

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SUPPLIER

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CAU.SE OESCRIPTION AND CORRECTIVE ACTIONS @

P~obable cause-foreign matte~ lodged in solenoid operated 4 way valve thereby pre-I I

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abnormalities.

With exceptfon to the initial valve ope~ation all subsequent operation~!***.

~~re well within the specified times setforth in the Tech~ Specs.

i r;-T";l1 singular nature of the event no further. a*ctions are -deemed necessary.

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