05000295/LER-1989-008, Forwards LER 89-008-00 Re Room Cooler Svc Water Supply Discrepancy Discovered on 890609

Forwards LER 89-008-00 Re Room Cooler Svc Water Supply Discrepancy Discovered on 890609

ML20247D144
Person / Time
Site:	Zion File:ZionSolutions icon.png
Issue date:	07/10/1989
From:	Joyce T COMMONWEALTH EDISON CO.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
0773D, 773D, NUDOCS 8907250054
Download: ML20247D144 (1)

LER-2089-008, Forwards LER 89-008-00 Re Room Cooler Svc Water Supply Discrepancy Discovered on 890609

Event date:
Report date:
2952089008R00 - NRC Website

text

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Comm:nw:Cith Edis n Zion Gtnerating Station O Zion, Illinois 60099 101 Shiloh Blvd.

Telephone 312/746 2084 July 10, 1989 U.S. Nuclear Regulatory Commission Document Control Desk Hashington, DC 20555

Dear Sir:

The enclosed Licensee Event Report number 89-008-00, Docket No.

50-295/DPR-39 from Zion Generating Station is being transmitted to you in l' accordance with the requirements of 10CFR50.73(a)(2)(v), which requires a 30 day written report when any event or condition that alone could have prevented the fulfillment of the safety function of systems that are needed to mitigate the consequences of an accident.

Very truly yours, T. P. Joyce Station Manager J Zion Generating Station TPJ/j1c

Enclosure:

Licensee Event Report cc: NRC Region III Administrator NRC Resident Inspector INP0 Record Center CECO Distribution List

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8907250054 090710 95

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0773D

-____ w & __ - _ - _ _ _ _ _ ._.

LICENSEE EVENT PEPORT (LER) pg .

Facility 14aae (IS- Dochet Number. (2) Pace (3) 7Jen Unit 1 0 15 10 10 10 1 21 91 5 1 l'of!0l2 Title (4)

C. S. Poom Cooler Service Wg.ier Suco1v Discrepancy ,

Event Date (5) LER Number (6) Reoort Date (7) Other Facilities Involved (8)

Month Day Year Year /,/,/, Sequential /j/j/ Revision Month Day Year Facility Names Docket Number (s) f

/// Number /// Number Zion Unit 2 Ol 51 01 01 01 31 01 4

~~~ ~

01 6 Ol 9 BII9 Bl 9 0l0?B _11 0 0l7 Ol 9 81 9 01510101Ol l l j THIS REPORT IS SUBMITTED PURSUANT TO THE REQUIREMENTS OF 10CFR OPMW l 11 heck one or more of the followino) (11) ,

l 1 20.405(c) 50.73(a)(2)(iv) 73.71(b)

{20.402(b) _ __._ _

POWER _ 20.405(a)(1)(i) _ 50.36(c)(1) _L. 50.73(a)(2)(v) ___ 73.71(c)

LEVEL

• 20.405(a)(1)(ii) 50.36(c)(2) _jL 50.73(a)(2)(vii) Other (Specify

!'9 l 9 (10) _ 20.405(a)(1)(iii) 50.73(a)(2)(i) _ 50.73(a)(2)(viii)(A) in Abstract l // /// / ///,/,/,/,/ / //,/,/ /,/ / // / / /, ___. 20.405(a)(1)(iv) _ 50.73( '(2)(ii) __ 50J3(a)(2)(viii)(B) below and in

////////'/j'j///' ///' //' //'j //////'/ f

_ 20.405(a)(1)(v) .__ 50.73(a)(2)(iii) __ . 50.73(a)(2)(x) Text)

LICENSEE CONTACT FOR THl$ LER (12)

Name TELEPHONE NUMBER AREA CODE lelvin HMderson. Tech Staff Enoineer ext. 315 3l1 l2 7 14 16 I -12 10 18 14 COMPLETE ONE LINE FOR EACH COM ON N FAILURE DES dIb 9 IN THIS REPORT (13)

CAUSE SYSTEM COMPONENT MANUFAC- ' REPORTABLE CAUSE SYSTEM COMPONENT MANUFAC- REPORTABLE' TUPER TO NPRDS TURER TO NPRDS I I I I i 1 I I I l -l i I l

! i I I I I I I I I I I i 1 SUPPLEMENTAL REPOPT EXPECTED (14) Erpected tLrtth i Dav i Year Submission X lyes (If ves. comelete EXFECTED SUBMISSION DATE) #

i NO 11 1 31 0 BI 9 ABSTRACT (Limit to 1460 spaces, i.e approximately fif teen single-space typewritten lines) (16)

During a review of Containment Spray (CS)(BE) Pumo Cubicle Room Cooler service water (SW)(BI) supply piping configuration, it was identified that a potential problem exists concerning the service water system ability to supply both room coolers with the current piping configuration and the cross-tie valves OSWO341 and OSWO342 in the normally closed position. The cause of the event is a Frobable design deficiency and possible procedural deficiencies. The safety significance and requirements for the subject room coolers is being evaluated. A supplemental report mill discuss the results of said eva' untion and corr ctive e actions required.

1 l

l 0773D

1. T0777C77D ,

_ - _ _ - - _ _ _ _ _ _ _ _ - - - - _ _ _ - . _ _ _ _ _ _ _ = _ _ - . _ _ _ _ _ _ _ _ _ . -

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1

.I LICFNS"E EVENT REPORT (LER) TEXT CONTINUATION form Rev't 0 FACI LITY' NAME,( 1 ) DOCKET NUMBER (2) LER NUMBER (6) Pace (31 _

. Year Sequential Revision Number -

NumbfL -

Zion Unit 1 0 l 5 1 0 l 0 1 0 l 21 91 5 819 - 01018 - Ol 0 0 12 0F 012 TEXT Energy Industry Identification System (EIIS) codes are identified in the text as (XX]

A. COND]T]'d PRIOR TO. EVENT MODE _ 3.__ - Fower Operation RX Power 997._ RCS.[AB) Temperature / Pressure 559 'F/2235 psig B. DESCRIPTION OF EVENT J During a review of room coler Service Water (SV) (BI) supply configuration, it was identified that a potential problem exists coacerning the SW system's ability to' supply both containment spray (CS) (BE) room coolers, given the plant's current SW piping configuration and the normal position of cross-tie valves OSw0341 and OSw0342 (normally closed). With these valves closed, the potential- exists that '

during a safety injection actuatior, e one unit, SW will only be supplied to one containment spray room

! cooler.

This configuration is potentially in conflict with the rSAR which states that " essential coolers are )

provided with two cooling water supplies by loop headers coming of f the main header". j C. APPARENT CAUSE OF EVENT At ti'is time, the most likely cause of event is a design problem. The design is currently being reviewed by the plant's architect - engineering firm. A procedural problem is also a possib'ie cause.

Specifically, the proper configuration for cross tie valves 0$V0341 and OSWO342 is under review. Having

! the cross-tie valves open would allow the cooler to have a redundant service water supp1'y source.

I D. $AFETY ANALYSIS OF EVENT After discovering the potential problem, the Technical Staff requested an analysis be performed to determine the actual heat load on the coolers in an accident si;uation and assess the need for room coolers. The safety analysis of this event will be discussed in a supplemental report.

E. CORRECTIVE ACTIONS Immediate corrective action was to open the cross-tie valves and place them under an administrative out of service. An architect - engineering firm is currently reviewing the cubicle room cooler cooling requirements for the ESF pumps.

l Long term corrective action is dependent on the results of this analysis.

l A supplemental report will be issued when the results of the analysis are evaluated. ( conuni t tment 295-200-89-064)

F. PPEVIOUS EVENT 1 At this time, previous occurrences have not been specifically identified, because the root cause has not yet been determined. A more detailed review of LER 295-86-01 is being done and a search for any other previous similar events will be documented in the supplemental report.

G. COMPONENT FAILURE DATA N/A 0773D

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