ML19345G107
| ML19345G107 | |
| Person / Time | |
|---|---|
| Site: | Humboldt Bay |
| Issue date: | 01/21/1975 |
| From: | Crane P PACIFIC GAS & ELECTRIC CO. |
| To: | Goller K Office of Nuclear Reactor Regulation |
| References | |
| 813, NUDOCS 8103020412 | |
| Download: ML19345G107 (2) | |
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c PACIFIC GAS AND E I.,E C T R,I C C O M PANY BOW 3 l
77 BE ALE STREET
- S A N F R ANCISCO, C ALIFO R NI A 94106 * (415) 781 4211 JOHN C. MORRISS EY m.e s.s a.
January 21, 1975
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Mr. Karl R. Goller
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Docket No. 50-133
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Dear Mr. Goller:
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Pursuant to Section IX.H.2.b. (2) of Appendix A to the Humboldt Bay Unit No. 3 Facility Operating License, we are hereby notifying you of a malfunction of the reactor cleanup pump.
The cleanup pump was removed from service at 2237 hours0.0259 days <br />0.621 hours <br />0.0037 weeks <br />8.511785e-4 months <br /> on December 23, 1974 because of excessive leakage through the me-j chanical seal on the pump shaft.
At the time the pump was removed from service the Unit was shutdown for the 1974 scheduled refueling and maintenance outage.
The seal leakage rate could not be handled by the leak off system and resulted in a water discharge in the im-mediate area of the pump.
The seal failure did not cause an airborne radioactivity condition.
l The loss of the cleanup pump does not render the cleanup system inoperable during power operation.
As in previous cases wM n the cleanup pump was out of service due to excessive seal leakage, the decineralizer effluent can be valved to the condenser hotwell instead of the reactor, utilizing the pressure differential between the reactor and the hotwell to operate the system during power operation.
Thus water quality will be maintained within license i
limits during normal operation.
The control rod hydraulic pumps (one of which is on the emergency power bus) may be used to operate the cleanup system as P00R ORIGINAL m
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Mr. Karl R. Goller 2
January 21, 1975 a backup to the core spray system during post-incident decay heat removal operations.
Very truly yours, Aug CC:
Mr. R. H. Engelken U. S. Nuclear Regulatory Commission Region V 1990 N. California Boulevard Walnut Creek Plaza, Suite 202 Walnut Creek, California 94596 l
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