ML20137M727

Proposed Tech Specs Revising Operability Requirements for Outside Power Distribution Sys.Certificate of Svc Encl

ML20137M727
Person / Time
Site:	Trojan File:Portland General Electric icon.png
Issue date:	09/10/1985
From:	PORTLAND GENERAL ELECTRIC CO.
To:
Shared Package
ML20137M704	List: ML20137M699 ML20137M719 ML20137M727
References
TAC-60018, NUDOCS 8509130315
Download: ML20137M727 (5)

Text

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, LCA 128 Attachment 1

. Page 1 of 4 ELECTRICAL POWER SYSTEMS

3/4.8.2 ONSITE POWER DISTRIBUTION SYSTEMS

. A.C. DISTRIBUTION - OPERATING J

LIMITING CONDITION FOR OPERATION 3.8.2.1 The following A.C. electrical busses shall be OPERABLE and energized with tie breakers open between redundant busses:

l 4160 volt Emergency Bus # Al 4160 volt Emergency Bus # A2

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480 volt Emergency Bus # B01/B03 480 volt Emergency Bus # B02/B04 120 volt A.C. Vital Bus # Y11 i

120 volt A.C. Vital Bus # Y13 120 volt A.C. Vital Bus # Y22 i

120 volt A.C. Vital Bus # Y24 APPLICABILITY: MODES 1, 2, 3 and 4.

1 ACTION:

With less than the above complement of A.C. busses OPERABLE, restore the 1

inoperable bus to OPERABLE status within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> or be in COLD SHUTDOWN within the next 36 hours4.166667e-4 days <br />0.01 hours <br />5.952381e-5 weeks <br />1.3698e-5 months <br />.

i SURVEILLANCE REQUIRENENTS 4.8.2.1 The specified A.C. busses shall be determined OPERABLE and energized with tie breakers open between redundant busses at least l

once per 7 days by. verifying correct breaker _ alignment and indicated power availability.

8509130315 850910 PDR P ADOCK 05000344 PDR

i. TROJAN-UNIT 1 3/4 8-6

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LCA 128 Attachment 1 Page 2 of 4 ELECTRICAL POWER SYSTEMS A.C. DISTRIBUTION - SHUTDOWN LIMITING CONDITION FOR OPERATION 3.8.2.2 As a minimum, the following A.C. electrical busses shall be OPERABLE and energized:

l 1 - 4160 volt Emergency Bus 1 - 480 volt Emergency Bus 2 - 120 volt A.C. Preferred Instrument Busses l t APPLICABILITY: MODES 5 and 6.

i ACTION:

Witt any of the above required electrical busses not energized in the required manner, immediately suspend all operations involving CORE ALTERATIONS, positive reactivity changes, or movement of irradiated fuel.

Initiate corrective action to energize the required electrical busses in the specified manner. Within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />, depressurize and vent the RCS

, through a >3.40 square-inch vent.

SURVEILLANCE REQUIREMENTS 1

4.8.2.2 The specified A.C. busses shall be determined OPERABLE and energized at least once per 7 days by verifying correct breaker alignment and indicated power availability. l 4

TROJAN-UNIT 1 3/4 8-7

f LCA 128 Attachment 1 Page 3 of 4 ELECTRICAL POWER SYSTEMS D.C. DISTRIBUTION - SHUTDOWN LIMITING CONDITION FOR OPERATION 3.8.2.4 As a minimum, the following D.C. electrical equipment and bus shall be energized and OPERABLE:

1 - 125-volt D.C. bus, and 1 - 125 volt battery bank and at least one charger associated with the above D.C. bus.

APPLICABILITY: MODES 5 and 6.

ACTION:

With less than the above complement of D.C. equipment and bus OPERABLE, immediately suspend all operations involving CORE ALTERATIONS, positive reactivity changes, or movement of irradiated fuel. Initiate corrective action to energize the required electrical bus, battery bank, and associated charger in the specified manner. Within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />, depressurize and vent the RCS through a >3.40 square-inch vent.

SURVEILLANCE REQUIREMENTS 4.8.2.4.1 The above required 125-volt D.C. bus shall be determined OPERABLE and energized at least once per 7 days by verifying indicated power availability.

4.8.2.4.2 The above required 125-volt battery bank and charger shall be demonstrated OPERABLE per Surveillance Requirement 4.8.2.3.2.

TROJAN-UNIT 1 3/4 8-10

• LCA 128 Attachment 1 Page 4 of 4 3/4.8 ELECTRICAL POWER SYSTEMS BASES The OPERABILITY of the A.C. and D.C. power sources and associated distribution systems during operation ensures that sufficient power will be available to supply the safety related equipment required for 1) the safe shutdown of the facility and 2) the mitigation and control of accident conditions within the facility. The minimum specified indepen-dent and redundant A.C. and D.C. power sources and distribution systems satisfy the requirements of General Design Criteria 17 of Appendix "A" to 10 CFR 50.

The ACTION requirements specified for the levels of degradation of the power sources provide restriction upon continued facility operation commensurate with the level of degradation. The OPERABILITY of the power sources are consistent with the initial condition assumptions of the accident analyses and are based upon maintaining at least one of each of the onsite A.C. and D.C. power sources and associated distribution systems OPERABLE during accident conditions coincident with an assumed loss of offsite power and single failure of the other onsite A.C. source.

The OPERABILITY of the minimum specified A.C. and 0.C. power sources and associated distribution systems during shutdown and refueling ensures that 1) the facility can be maintained in the shutdown or refueling condition for extended time periods and 2) suf ficient instrumentation and control capability is available for monitoring and maintaining the facility status.

The basis for depressurizing and venting the RCS through a

>3.40 square-inch vent when less than the required busses are OPERABLE is provided on Page B 3/4 4-9.

TROJAN-UNIT 1 B 3/4 8-1

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UNITED STATES OF AMERICA i NUCLEAR REGULATORY COMMISSIOU 1 In the Matter of )

) l PORTLAND GENERAL ELECTRIC COMPANY, ) Docket 50-344 l THE CITY OF EUGENE, ORECON, AND ) Operating License NPF-1 PACIFIC POWER & LICllT COMPANY )

)

(TROJAN NUCLEAR PLANT) )

CERTIFICATE OF SERVICE I hereby certify that copies of License Change Application 128 to the Operating License for Trojan Nuclear Plant, dated September 10, 1985, have been served on the following by hand delivery or by deposit in the United States mail, first class, this 10th day of September 1985:

Mr. Lynn Frank, Director I

State of Oregon

Department of Energy Labor & Industries Blds, Rm 102 i i Salem OR 97310 t i

Mr. Robert L. King Chairman of County Commissioners Columbia County Courthouse St. llelens OR 97051 0:n

$at G .' . Zimmerman, M.anager Nuclear Regulation Branch Nuclear Safety & Regulation Subscribed and sworn to before me this 10th day of September 1985.

b__ $

Notary Public of Ordf,on i

OMyCommission &4h[f /

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