ML18051B403

Proposed Tech Spec 3.7,revising Electrical Sys as Result of Discovery & Subsequent Repair of Cracked Cylinder Head on Diesel Generator 1-1

ML18051B403
Person / Time
Site:	Palisades
Issue date:	05/24/1985
From:	CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.)
To:
Shared Package
ML18051B402	List: ML18051B401 ML18051B403
References
NUDOCS 8505290096
Download: ML18051B403 (2)

Text

ATTACHMENT Consumers Power Company Palisades Plant Docket 50-255 PROPOSED TECHNICAL SPECIFICATIONS PAGE CHANGES May 24, 1985 1 Page

~5~5290096 850524 p ADOCK 050002SS

- ___ PDR IC0585-0208C-NL04

.~ .,.

3.7 ELECTRICAL SYSTEMS (Contd)

a. Station power transformer 1-2 (2400 V) may be inoperable for up to 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> provided the operability of both diesel generators is demonstrated immediately.

b. Start-up transformer 1-2 (2400 V) may be inoperable for up to 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> provided the operability of both diesel generators is demonstrated immediately. Continued operation beyond 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> is permissible provided that a report is sent to the NRC immediately with an outline of the plans for prompt restoration of the start-up transformer and the additional precautions to be taken while the transformer is out of s.e.rvice, and continue operating until notified differently by the NRC.

c. 2400 V engineered safeguards bus lC or lD may be inoperable for up to 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> provided the operability of the diesel generator associated with the operable bus is demonstrated immediately and there are no inoperable engineered safety feature components associated with the operable bus.

d. 480 V distribution bus 11 or 12 may be inoperable for up to 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> provided there a~e no inoperable safety feature components associated with the operable bus.

e. MCC No 1 and 7 or. 2 and 8 may be inoperable for up to 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> provided there are no inoperable safety feature components associated with the operable pair of MCC.

f. 125 V d-c bus No 1 or 2 may be inoperable for up to 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> provided there are no inoperable safety feature components associated with the operable bus and adequate portable emergency lighting is available during the inoperability of the No 2 bus.

g. One of the four preferred a-c buses may be inoperable for 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> provided the reactor protection and engineered safety feature systems supplied by the ~emaining three buses are all operable.

h. One of the station batteries may be inoperable for 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />, providing both battery chargers on the affected bus are in operation.

i. One of the diesel generators may be inoperable for up to 7 days*

(total for both) during any month, provided the other diesel is started to verify operability, shutdown and the controls are left in the automatic mode, and there are no inoperable engineered safety feature components associated with the operable diesel generator.

• 10 days one time only, for the month of May 1985.

3-42 Proposed TSP0585-0208A-NL04