ML20149J930
| ML20149J930 | |
| Person / Time | |
|---|---|
| Site: | North Anna  |
| Issue date: | 02/18/1988 |
| From: | Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML20149J922 | List: |
| References | |
| NUDOCS 8802230290 | |
| Download: ML20149J930 (2) | |
Text
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%o, UNITED STATES e*
NUCLEAR REGULATORY COMMISSION 3
j WASHING TON, o. C. 2055$
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'59....8 FNCLOSURE SAFETY EVALUATION PY TPE OFFICE OF FUCLEAR REACTOR REGULATION PELATING TO RELIEF l
i RE0l'EST No. 6 0F THE INSERVICE TESTING PROGRAM VIRGINIA ELFCTRIC AND POWER COMPANY NORTH ANNA POVER STATION llNITS 1&?
DOCKET NOS. 50-338/339 RELIEF RE0 VEST The licensee has recuested relief from the ASME Code,Section XI, IWP-3100 requirerents to:
1.
Measure inlet pressure, differential pressure, flow rate and vibrations, and 2.
Measure lube oil leval or pressure and hearino temperature 'or pumps 1.-RS-P-1A, 1-RS-P-1B, ?-RS-P-IA and ?-RS-P-18.
LICENSEE'S BASIS FOR RE00ESTING RFLIEF Full-flow testing of these pumps would soray water inside the containment buildinc. These pumps were desigred to be rur dry periodically for a short period of time to verify operability.
Procer lube oil level or pressure cannot i
be observed because pump bearings are in the main flow path.
IWP-4310 provides 1
exemption from measuring bearing temperatures for bearinas in the main flow path.
LICENSEE'S PP0 POSED ALTERNATE TESTING These pumps will be run dry to verify operability.
Each pump is equipped with a sensor to detect pump rotation which alems in the control room.
This alarm will be observed during each r. ump test.
In addition, motor current will be recorded for each pump test.
.iach pump is equipoed with a vibration detector and high vibration alarm in the control room and the alarm will be observed i
during each pump test.
EVALUATION The licensee has requested ralief from performino the Code-required testina to measure the parameters used to def. ermine the hydraulic and mechanical perfor-mance of the pumps. Alternatively, the licensee has proposed that these pumps be tested quarterly with a dry pump run.
These pumps are not equipped with a 1
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means of ouartarly testing at power other than a dry pump run.
However, thesa pumps can be flow tasted during refueling outages using a recirculation path by building a temporarv reservoir insida containment as a source of suction.
Testing the containment recirculation pumps 1 PS-P-1A, 1-RS-P-18, ?-RS-P-1A, and 2 PS-P-18 with flow during refuelirq nutaaes and quarteriv dry pump runs provides a reasnnable alternative to the Code requirements.
In case of extend-ed intervals between refueling cutages, these pumps must be hydraulically tested at least once every 30 months. Verification of lubricant level or pressure of this type of pump is not possible since the pump bearings are in the #10w path.
Because of the design of this system, compliance with the Code requiraments is impractical. Conformance with the Code would only be possible if the contain-ment recirculation system were redesigned, which would be a sianificant burden for the licensee.
Accordingly, nursuant to 10 CFR 50.55a(g)(6)(il, relief may be granted fron the Code-required quarter 1v #10w testing and 'rnm the Code re-cuirements to verify lubricant level or pressura provided that refueling outaga finw testing at least orce every 30 months and quarterly dry oumo testing are per#ormed as discussed above. The relie" granted is authorized by law and will not endanger life or property or the common defense and security and is other-wise in the public interest giving due consideration to the burden upon the licensee that could result if the requirements were imposed on the facilitv.
Dated:
February 18, 1988 Principal Contributor:
T. K. McLellan I
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