U-601265, Ro:On 880901,HPCS Initiated & Injected Water Into Reactor for 28 During Maint Surveillance Activities on Reactor Water Level Transmitter.Injection Valve & HPCS Pump Secured. Notification of Unusual Event Lasted Approx 10 Minutes

Ro:On 880901,HPCS Initiated & Injected Water Into Reactor for 28 During Maint Surveillance Activities on Reactor Water Level Transmitter.Injection Valve & HPCS Pump Secured. Notification of Unusual Event Lasted Approx 10 Minutes

ML20154B824
Person / Time
Site:	Clinton
Issue date:	09/02/1988
From:	Holtzscher D ILLINOIS POWER CO.
To:	NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM)
References
U-601265, NUDOCS 8809140153
Download: ML20154B824 (2)

Text

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A U-601265 i *^

R100-88'09-02)-LP 1A.120 1

/LLINDIS POWER 00MPANY l CUNTON PC%ER STATION P.o. BOX 678. CLINToN. ILLINoi$ 61727 Septemb1r 2, 1988 Docket No. 50-461 ,

U.S. Nuclear Regulatory Commission i Document Control Desk Washington, D.C. 20555 j

Subject:

Clinton Power Station l Notification of Unusual Event Dear Sir l

l Please find attached a summary report of the "Notification of Unusual Event (NOUE)" which occurred at Clinton Power Station on September 1, 1988. This summary report is submitted pursuant to Appendix 1 of NUREG-0654 (Revision 1) and Clinton Power Station l Emergency Plan Implementing Procedure AP-03. If you have any questions concerning this summary report, please contact me at (217) 935-8881, l

extension 3408.

Sincerely yours,

'h, e l

D. L. Holtzscher I j Acting Manager - Licensing and ,

1 Safety l RLC/kar  ;

1 l Attachment 5 cc: Regional Administrator, Region III, USNRC l W. Snell, Chief Emergency Preparedness Section NRC Clinton Licensing Project Manager '

NRC Resident Office  ;

Illinois Department of Nuclear Safety l P

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Clinton Power Station '

Notification of Unusual Event on Thursday, September 1, 1988, at 2250 hours0.026 days <br />0.625 hours <br />0.00372 weeks <br />8.56125e-4 months <br />, a Notification of Unusual Event (NOUE) was declared in accordance with Emergency Plan Implementing Procedure EC-02 Emergency Classifications. This procedure requires that a NOUE be declared if the High Pressure Core Spray (HPCS) initiates and injects.

Clinton Power Station was operating at approximately 100% power in Mode 1.

On Thursday, September 1, 1988, at 2240 hours0.0259 days <br />0.622 hours <br />0.0037 weeks <br />8.5232e-4 months <br /> the High Pressure Core Spray (HPCS) system initiated and injected water into the reactor for a period of 28 seconds. The automatic initiation occurred while maintenance surveillance activities were in progress on a reactor water level transmitter.

The State of Illinois was notified of the NOUE at 2300 hours0.0266 days <br />0.639 hours <br />0.0038 weeks <br />8.7515e-4 months <br /> on Thursday, September 1, 1988; the Nuclear Regulatory Commission (NRC) '

Incident Response Center was notified at 2336 hours0.027 days <br />0.649 hours <br />0.00386 weeks <br />8.88848e-4 months <br />; and the NRC L Resident Inspector was notified at 2330 hours0.027 days <br />0.647 hours <br />0.00385 weeks <br />8.86565e-4 months <br />. '

The plant responded by shutting the injection valve and securing the HPCS pump. Plant operating parametors were checked and verified to be .

operating within normal limits.

The Shift Supervisor terminated the NOUE at 2300 hours0.0266 days <br />0.639 hours <br />0.0038 weeks <br />8.7515e-4 months <br />. Since the NOUE only lasted approximately ten minutes, the notifications to the State of Illinois at 2300 1.ours and the NRC Incident Respons: Center at 2336 hours0.027 days <br />0.649 hours <br />0.00386 weeks <br />8.88848e-4 months <br /> included the NOUE termination.  !

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