ML20065E701

Special Rept:On 940307,fuel Oil Pump House High Pressure Carbon Dioxide Sys & Control Room Halon Sys Did Not Perform as Required.Control Room Halon Sys Tested Satisfactorily & Declared Operable

ML20065E701
Person / Time
Site:	North Anna
Issue date:	04/06/1994
From:	Stewart W VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
94-176, NUDOCS 9404110055
Download: ML20065E701 (2)

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YIIfGINIA ELECTitIC AND POWElt COMi*ANY j

, ilICH M OND, VIItOINI A 20261 April 6, 1994 l U.S. Nuclear Regulatory Commission Serial No.94-176 Attention: Document Control Desk MPW/EJW Washington, D.C. 20555 Docket Nos. 50-338 50-339 License Nos. NPF-4 NPF-7 Gentlemen:

VIRGINIA ELECTRIC AND POWER COMPANY .

NORTH ANNA POWER STATION UNITS 1 & 2 FUEL OIL PUMP HOUSE HIGH PRESSURE CARBON DIOXIDE SYSTEM AND CONTROL ROOM HALON SYSTEM SPECIAL REPORT Pursuant to North Anna Updated Final Safety Analysis Report (UFSAR) Technical Requirement 16.2.1.2.3 Action - A.2.2 and 16.2.1.2.4 Action A.2.2, a Special Report 's bereby submitted because the manual actuation portion of the functional tests, which verify operability of the Fuel Oil Pump House High Pressure Carbon Dioxide (CO2)

System and Control Room (CR) Halon System, were not performed as required.

Subsequently, testing was satisfactorily completed on the CO2 System and CR Halon System.

A systematic review of the North Anna UFSAR Chapter 16 surveillance requirements was initiated in 1994 as a continuation of the Technical Specification surveillance review completed in 1993. The UFSAR review involves a line-by-line examination to verify surveillance requirements are cornpletely addressed by station procedures.

During the review of surveillance requirements associated with the CO2 System it was ,

determined that manual actuation of the system had not been functionally tested. On 1 March 7,1994, the CO2 System was declared inoperable.

I A temporary revision to the functional test procedure was made to test manual actuation of the CO2 System. The initial test of the CO2 System's .nanual actuation i failed. An investigation initiated with vendor support attributed the initial failure of the l I

CO2 system to the lack of component exercise. The CO2 System was satisfactorily retested on March 9,1994. Minor leakage was observed from two pneumatic control valves during the investigation. An evaluation confirmed that the leakage from the pneumatic valves was minute and would not affect operability of the CO2 System. l Work orders were submitted to repair the leakage, and the CO2 System was declared operable on March 9,1994.  ;

On March 17,1994, the CR Halon System was also declared inoperable after it was determined that portions of the system had not been functionally tested. The test i I

procedure was temporarily revised to implement adequate testing of the CR Halon System regarding manual and automatic actuation. On March 25,1994, CR Halon System tested satisfactorily and was declared operable. Permanent procedure 1 0i revisions will be completed prior to the next scheduled test performance. fg '

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A fire watch was established in accordance with UFSAR Chapter 16 until both of the above systems were returned to operable status.

The systematic review of the North Anna UFSAR surveillance requirements is currently scheduled for completion by the end of 1994. Similar situations identified during the examination will be submitted upon completion of the review in a single report.

This Special Report has been reviewed by the Station Nuclear Safety and Operating Committee and will be provided to the Management Safety Review Committee.

Should you have any questions regarding this report, please contact us.

Very truly yours, l }, .

. ~

/t' L ) ,j.L s -

W. L. Stewart Senior Vice President - Nuclear cc: U.S. Nuclear Regulatory Commission Region ll 101 Marietta Street, N.W.

Suite 2900 Atlanta, Georgia 30323 R. D. McWhorter NRC Senior Resident Inspector North Anna Power Station