3F1084-05, Special Rept 84-04:on 840919,fire Suppression Water Sys Placed in Degraded Mode of Operation to Support Sys Mod. Caused by Redundant Loop Flow Path Allowing Only One Fire Svc Sys Header to Remain in Svc.Loop Removed

Special Rept 84-04:on 840919,fire Suppression Water Sys Placed in Degraded Mode of Operation to Support Sys Mod. Caused by Redundant Loop Flow Path Allowing Only One Fire Svc Sys Header to Remain in Svc.Loop Removed

ML20099C507
Person / Time
Site:	Crystal River
Issue date:	10/03/1984
From:	Westafer B, Westafer G FLORIDA POWER CORP.
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
References
3F1084-05, 3F1084-5, RO-84-04, RO-84-4, NUDOCS 8411190565
Download: ML20099C507 (2)

Text

.

a  %

og 84 BCT.5 Pl: 26 M

M October 3,1984 3F1084-05 s

Mr. 3. P. O'Reilly Regional Administrator, Region II Office of Inspection and Enforcement U.S. Naclear Regulatory Commission 101 Marietta Street N.W., Suite 2900 Atlanta, GA 30323

Subject:

Crystal River Unit 3 Docket No. 50-302 Operating License No. DPR-72 Special Report No. 84-04

Dear Mr. O'Reilly:

Enclo.ed is Special Report No. 84-04 which is submitted in accordance with Technical Specification 6.9.2.

Sincerely,

/ ,'

l

• G. R. Westafer Manager, Nuclear Operations Licensing and Fuel Management i

AEF/feb Enclosure l

8411190565 841003' PDR ADOCK 05000302 S PDR OFFICIArmis-fC5 >

GENERAL OFFICE 3201 Thirty fourth treet South e P.O. Box 14042, St. Petersburg, Florida 33733 e 813-866-5151

SPECIAL REPORT 84-04 On September 19, 1984, Crystal River Unit 3 was operating at 73% reactor power and 640 MWe. At 0715, the fire suppression water system was placed in a degraded mode of operation to support a system modification. The partial system isolation required to accomplish this modification removed two of the three fire service j pumps from service and placed the third pump in a recirculation mode of operation' to maintain normal system pressure. In accordance with the preplanned partial isolation of the fire service system, a dedicated operator was stationed at the recirculation valve which would have to be closed to restore the pump to operable status. Additional system degradation was caused by the partial system isolation which limited the ability to sectionalize or isolate the distribution piping in the event a rupture occurred. The partial system isolation removed the redundant loop flow path which allowed only one fire service system header to remain in service.

During this mode of operation, the fire suppression water system was deemed inoperable by the CR-3 Technical Specification limiting condition for operation in that manual operator action would be required to place the pump in a condition to perform its design function. The fire service suppression system was returned to service at 1755 on September 19, 1984, resulting in a total time of inoperability of 10 hours1.157407e-4 days <br />0.00278 hours <br />1.653439e-5 weeks <br />3.805e-6 months <br /> and 40 minutes.

This Special Report is submitted as required by Technical Specification 6.9.2.

1 i

. - - _ . . _- . _.