TXX-7125, Interim Deficiency Rept CP-87-26 Re Diesel Generator Fuel Oil Transfer Pump Suction Lift.Initially Reported on 870629. Alternatives Being Evaluated to Provide Addl Confidence of Proper Pump Operation.Next Rept Expected by 880331
| ML20237E692 | |
| Person / Time | |
|---|---|
| Site: | Comanche Peak  |
| Issue date: | 12/23/1987 |
| From: | Counsil W, John Marshall TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC) |
| To: | NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM) |
| References | |
| CP-87-26, TXX-7125, NUDOCS 8712290130 | |
| Download: ML20237E692 (2) | |
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=M Log # TXX-7125 File # 10110
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909.5 Ref.#10CFR50.55(e)
R# ELECTRIC wun m c. coumu December 23, 1987 Esecutwe Vut Presaient V. S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, D. C.
20555
SUBJECT:
COMANCHEPEAKSTEAMELECTRICSTATION(CPSES)
DOCKET N05. 50-445 AND 50-446 DIESEL GENERATOR FUEL OIL TRANSFER PUMP SVCTION LIFT SDAR: CP-87-26 (INTERIM REPORT)
Gentlemen:
On June 29, 1987, we verbally notified your Mr. H. S. Phillips of a deficiency involving the diesel generator fuel oil transfer pump. This is-an interim report af a potentially reportable item under the provisions of 10CFR50.55(e).
Our latest report on this issue was logged TXX-6890, dated October 26, 1987.
We are reporting this issue under the provisions of 10CFR50.55(e).
The required information follows.
Description Calculations performed under the Design Validation Program (DVP) indicated that the existing diesel generator fuel oil transfer pumps were specified for a suction lift that-is less than required during " worst case" operating conditions.
This condition is contrary to the FSAR which requires a full seven days of fuel oil for the emergency diesel generators while operating at a 100% power level.
Due to the suction lift deficiency, a full seven days of fuel oil may not be transferable from the storage tank to the day tank.
The cause of this deficiency is the failure of the diesel generator fuel oil pump specification to conform to the criteria stated in the FSAR.
This condition is limited to the diesel generator fuel oil transfer system.
Safety Implications We are reporting this issue primarily on the basis that a deficiency in final design exists such that the criteria stated in the FSAR are not met.
The a
CPSES design is based upon a seven day supply of fuel oil in the storage tanks. Although improbable, it could be hypothesized that the diesel generators would fail due to a lack of fuel during an accident.
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TXX-7080 December 23, 1987 Page 2 of 2 Corrective Action We are evaluating several alternatives that will provide additional confidence of proper pump operation under worst case design basis assumptions. Our next report will detail specific corrective action planned and a schedule for completion, and will be provided no later than March 31, 1988.
Very truly yours, he d.
(( K S c [
W. G. Counsil i
By:
J. S. Marshall Supervisor, Generic Licensing MCP/grr c - Mr. R. D. Martin, Region IV Resident Inspectors, CPSES (3)
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