ML20040H496
| ML20040H496 | |
| Person / Time | |
|---|---|
| Site: | Big Rock Point File:Consumers Energy icon.png |
| Issue date: | 02/12/1982 |
| From: | Bordine T CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.) |
| To: | Crutchfield D Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 8202180313 | |
| Download: ML20040H496 (4) | |
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@ Consumers Power Company Genered offices: 1945 West Parnell Road, Jackson, MI 49201 * (517) 788-0550 February 12, 1982 0
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Dennis M Crutchfield, Chief 2
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Washington, DC 20555
'D ' l M DOCKET 50-155 - LICENSE DPR BIG ROCK POINT PLANT - CONTAINMENT ISOLATION VALVE
SUMMARY
RESPONSE
NRC letter dated March 24, 1981 requested information on the operation and testing of containment isolation valves at our Big Rock Point Plant for the period January 1, 1981 to February 1, 1982. Specifically, operational history for instances where containment isolation occurred and the results of Appendix J tests including identification of valve failure was requested.
The attachments provide the results of our study.
fable I identifies the Big Rock Point Plant containment isolation valves, penetrations and locks. The table lists the total number of tests and the test failures for both stroke and' leak rate tests. Several tests were not required to be performed during the requested survey period. Table II lists the causes for failares referenced in Table I.
During the specified period, there were no instances where total containment isolation occurred as a result of automatic initiation. No failures occurred during normal use of the valves, locks or penetrations.
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Thomas C Bordine Staff Licensing Engineer g
CC Administrator, Region III, USNRC
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NRC Resident Inspector-Big Rock Point pages oc0282-0012bl42 8202180313 820212 PDR ADOCK 05000155 P
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Containment' Isolation Valve Summary Response TABLE I CONTAINMENT ISOLATION VALVES, PENETRATIONS AND LOCKS Tests Leak Stroke Rate Item Number Item Description Tests Tests Failure CV 4094 Ventilation Exhaust Valve 20 2
1 __
CV 4095 Ventilation Exhaust Valve 20 2
1 __
CV 4096 Ventilation Supply Valve 20 2
CV-4097 Ventilation Supply Valve 20 2
SV-9155 Ventilation Probe 8
0 SV-9156 Ventilation Probe 8
0 Personnel Lock 2
Personnel Lock Powell Check Valve 2
Personnel Lock Jenkins Valve 0
Equipment Lock 2
Equipment Lock Powell Check Valve
-2 Equipment Lock-Jenkins Valve 0
Escape Lock 2
Nordstrom Equalizing Valve 0
H-40 Conax Penetration 2
H-65 Conax Penetration 2
H-81 Conax Penetration 2
H-83 Conax Penetration 2
CV-4025 Dirty Sump Pump Discharge 8
0 CV-4103 Dirty Sump Pump Discharge 8
0 VEC-301 Emergency Condenser Drain Check 0
0
- Not applicable nu0282-0012c142
Big R:ck Point-2 Ccntainment Isolation Valve Summary Response Tests Leak Stroke Rate Item Number Item Description Tests
' Tests
-Failures CV-4031 Clean Sump Pump Discharge 8
0 CV-4102 Clean Famp Pump Discharge 8
0 Emergency Condenser Shell Side Sample Point Check Valve 1
VEC-107 EC Sight Glass Vent Valve 1
CV-4049 Treated Waste Return 0
0 VRW-313 Treated Waste Return Check Valve 0
CV-4105 Demin Water Isolation Valve 7
0 Check Valve Demin Water Isolation Check Valve O
CV-4091 Resin Sluice Valve 1
0 CV-4092 Resin Sluice Valve 1
0 CV-4093 Resin Sluice Valve 1
0 CV-4027 Reactor and Fuel Pit Drain 1
2 2 __
CV-4117 Reactor and Fuel Pit Drain 1
1 1 __
VRD-310 CRD Supply Check Valve 1
VRD-311 CRD Supply Check Valve 1
M0-7050 Main Steam Isolation Valve 0
1 M0-7065 Main Steam Drain Valve 0
1 VFW-304 Feedwater Check Valve 1
H-80 Penetration O
H-88 Penetration O
H-91 Penetration 0
- Not applicable nu0282-0012t142
J Dig Rock Point
- Containment Isolation Valve Summary Response-
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V TABLE II FAILURES AND CAUSES Item Reference Cause/ Comment i
CV-4094 LER 81-010 Stroke time slow.
Pilot solenoid valve exhibited sluggish operation. Replaced and established preventive maintenance schedule.
CV-4095 LER 81-012 Stroke time slow.
Exact cause not determined. Pilot solenoid replaced with unit of increased exhaust capability.
Preventive maintenance established in conjunction with item above.
CV 4027 LER 81-023 Leak rate test failure.
(2 failures)
Exact cause unknown.
Investigation in progress.
CV 4117 LER 81-023 Leak rate test failure.
Valve seat worn and repairs made.
4 1
nu0282-0012d142 i
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