ML20134F008

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Proposed Tech Specs 3.8.1.1 Re Electrical Power Systems
ML20134F008
Person / Time
Site: Fermi DTE Energy icon.png
Issue date: 01/30/1997
From:
DETROIT EDISON CO.
To:
Shared Package
ML20134F004 List:
References
NUDOCS 9702070206
Download: ML20134F008 (6)
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. . f Attachment I to NRC-97-0002 Page1 $

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PROPOSED  !

TECHNICAL SPECIFICATION PAGES i i

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I 9702070206 970130 '

gDR ADOCK 05000341,'"

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3/4.8 ELECTRICAL POWER SYSTEMS 3/4.8.1 A.C. SOURCES A.C. SOURCES - OPERATING l l

I LIMITING CONDITION FOR OPERATION 3.8.1.1 As a minimum, the following A.C. electrical power sources shall be  ;

OPERABLE: l

a. Two physically independent circuits between the offsite transmission network and the onsite Class IE distribution system, and
b. Two separate and independent onsite A.C. electrical power sources, Division I and Division II, each consisting of two emergency diesel generators, each diesel generator with:
1. A separate day fuel tank containing a minimum of 210 gallons of fuel,
2. A separate fuel storage system containing a minimum of 35,280 gallons of fuel, and
3. A separate fuel transfer pump.

APPLICABILITY: OPERATIONAL CONDITIONS 1, 2, and 3.

ACTION:

a. With one or both offsite circuits of the above required A.C. i electrical power sources inoperable, be in at least HOT SHUTDOWN within 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> and in COLD SHUTDOWN within the next 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />; demonstrate the OPERABILITY of the remaining A.C. sources by performing Surveillance Requirement 4.8.1.1.1. within one hour and i at least once per 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> thereafter and,
b. With one or both diesel generators in one of the above required onsite A.C. electrical power divisions inoperable;
1. Demonstrate the OPERABILITY of the remaining A.C. sources by performing Surveillance Requirement 4.8.1.1.1 within one hour and at least once per 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> thereafter, and if the diesel generator (s) became inoperable due to any cause other than an inoperable support system, an independently testable component, or preplanned preventive maintenance or testing, by performing Surveillance Requirement 4.8.1.1.2.a.4 for one diesel generator at a time within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />, unless the absence of any potential common mode failure for the remaining diesel generators is determined, and FERMI UNIT 2 3/4 8-1 Amendment No. JJ,

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. ELECTRICAL POWER SYSTEMS LIMITING CONDITION FOR OPERATION (Continued)

ACTION (Continued)

2. Verify within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> and at least once per 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> thereafter, that CTG 11-1 is OPERABLE. Restore the inoperable division to OPERABLE status within 7 days or be

, in at least HOT SHUTDOWN within the next 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> and in COLD SHUTDOWN within the following 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.

3. If the requirements of ACTION b.2, above for CTG 11-1 cannot be met, either restore the inoperable division to OPERABLE status within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> (not to exceed 7 days from the time the division became inoperable); or, satisfy the requirements of ACTION b.2 above within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> and restore the inoperable division to OPERABLE status within 7 days

, from the time the division became inoperable; or, be in at least HOT SHUTDOWN within the next 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> and in COLD SHUTDOWN within the following 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.

c. With one or both diesel generators in one of the above required onsite A.C. electrical power divisions inoperable, in addition to ACTION b, above, verify within 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> that all required systems, subsystems, trains, components and devices that depend on the remaining onsite A.C. electrical power division as a source of emergency power are also OPERABLE; otherwise, be in at least HOT SHUTDOWN within the next 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> and in COLD SHUTDOWN within the following 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />,
d. With both of the above required onsite A.C. electrical power divisions inoperable;
1. Demonstrate the OPERABILITY of the remaining A.C. sources by performing Surveillance Requirement 4.8.1.1.1 within one hour and at least once per 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> thereafter; and
2. Restore at least one of the above required inoperable divisions to OPERABLE status within 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> or be in at least HOT SHUTDOWN within the next 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> and in COLD SHUTDOWN within the following 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />; and
3. Restore the second of the above required divisions to i OPERABLE status within the time required by Action b above l from the time of initial loss or be in at least HOT SHUTDOWN within the next 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> and in COLD SHUTDOWN within the ,

following 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.

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l FERMI - UNIT 2 3/4 8-2 Amendment No. ,

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l- 3/4.8 ELECTRICAL POWER SYSTEMS i

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3/4.8.1. 3/4.8.2 and 3/4.8.3 A.C. SOURCES. D.C. SOURCES and ONSITE POWER DISTRIBUTION SYSTEMS The OPERABILITY of the A.C. and D.C. power sources and associated distribution systems during operation ensures the, 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 independent 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 is consistent with the initial condition assumptions of the safety analyses and is based upon maintaining at least one of the onsite A.C. and the corresponding 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. or D.C. source.

When one or both diesel generators in an electrical power division are-inoperable, the allowed out-of-service time (A0T) is extended from 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> to 7 days if CTG 11-1 is verified to be OPERABLE. This verification (by .

administrative check of breaker, line availability and CTG 11-1 status) will confirm that the CTG is capable of supplying power to Division I loads- The .

verification is performed prior to taking the diesel generator out of service for extended maintenance. If the CTG becomes inoperable during the 7 day A0T and cannot be restored to OPERABLE status, the diesel generator A0T reverts ,

back to 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> not to exceed a total of 7 days from the tima the diesel )

-generator originally became inoperable.

The A.C. and D.C. source allowable out-of-service times are based, in  !

part, on Regulatory Guide 1.93, " Availability of Electrical Power Sources", 1 December 1974. When'one diesel generator is inoperable, there is an i additional. ACTION requirement to verify that all required systems, subsystems, j trains, components and devices, that depend on the remaining OPERABLE diesel generator as a source of emergency power, are also OPERABLE. This requirement  ;

is intended to provide assurance that a loss of offsite power event will not result in a complete loss of safety function of critical systems during the  ;

period one of the diesel generators is inoperable. The term verify as used in i this context means to administrative 1y check by examining logs or other information to determine if certain components are out-of-service for maintenance or other reasons. It does not mean to perform the surveillance requirements.needed to demonstrate the OPERABILITY of the component.

i FERMI - UNIT 2 B 3/4 8-1 Amendment No.J#7,

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-1 El.ECTRICAL POWER SYSTEMS I BASES l l  !

A.C. SOURCES. D.C. SOURCES, and ONSITE POWER DISTRIBUTION SYSTEMS (Continued)

The OPERABILITY of the minimum specified A.C. and D.C. power sources and i associated distribution systems during shutdown and refueling ensures that (1) the facility can be maintained in the shutdown or refueling condition for l extended time periods and (2) sufficient instrumentation and control .

capability is available for monitoring and maintaining the unit status. l I

The surveillance requirements for demonstrating the OPERABILITY of the l diesel generators are in accordance with the recommendations of Regulatory  :

Guide 1.9, " Selection of Diesel Generator Set Capacity for Standby Power '

Supplies", December 1979; Regulatory Guide 1.108, " Periodic Testing of Diesel )

Generator Units Used as Onsite Electric Power Systems at Nuclear Power Plants", Revision 1, August 1977; and Regulatory Guide 1.137, " Fuel-Oil System for Standby Diesel Generators", Revision 1, October 1979, as modified

. by Generic Letter 94-01, "Ren. oval of Accelerated Testing and Special Reporting Requirements for Emergency Diesel Generators," May 1994.

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l FERMI - UNIT 2 B 3/4 8-la Amendment No. 107

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FERMI - UNIT 2 8 3/4 8-lb Amendment No.

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