ML20086Q836
| ML20086Q836 | |
| Person / Time | |
|---|---|
| Site: | Waterford  |
| Issue date: | 07/26/1995 |
| From: | ENTERGY OPERATIONS, INC. |
| To: | |
| Shared Package | |
| ML20086Q831 | List: |
| References | |
| NUDOCS 9507280209 | |
| Download: ML20086Q836 (5) | |
Text
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I3'/4.8 ELECTRICAL POWER SYSTEMS
.( , ,'3/4.8.1 A.C. SOURCES OPERATING LIMITING CONDITION FOR OPERATION
. .3.8.i.1 As a minimum, the following A.C. electrical power sources shall be OPERABLE:
- a. Two physically independent circuits between the offsite transmission network and the onsite Class IE. distribution system, and '.
- b. Two separate and independent diesel generators, each with:
1.
Diesel of fuel,oiland feed tanks containing.a minimun, volume of 339 gallons ,
2.
A separate dissel generator fuel oil storage tank containing:
- a. A minimum volume of 38,760 gallons of fuel, or
- b. l A fuel oil volume less than 38,760 gallons'and greater "
than 38,000 gallons of fuel for a period not to exceed 5 days (provided replacement fuel oil is onsite within the first 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br />), and -
- 3. A separate fuel transfer pump.
APPLICABILITY: MODES 1, 2, 3, and 4.
ACTION: .
- a. With one offsite circuit of 3.8.1.la inoperable, demonstrate the OPERABILITY of the remaining offsite A.C. circuit, by performing-Surveillance Requirement 4.8.1.1.la within I 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. If either diesel generator has not been successfully tested within the past 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />, demonstrate its OPERA 8ILITY by performing Surveillance Requirement 4.8.1.1.2a.4 separately for each diesel generator (unless it is already operating) within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />. Restore the offsite A.C. circuit to OPERA 8LE status within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> or be in at least HOT STAN08Y within the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> and in COLD SHUTDOWN within the following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />.
- b. With one diesel generator of 3.8.1.lb inoperable, demonstrate the OPERABILITY of the offsite A.C. circuits by performing Surveillance Requirement 4.8.1.1.la (separately for each offsite A.C. circuit) within I 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. If the diesel generator became inoperable due to any cause other than preplanned preventive maintenance or testing, demonstrate the OPERABILITY of the remaining OPERABLE diesel generator (unless it has been successfully tested in the last 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />) by performing Surveillance Requirement
- 4.8.1.1.2a.4 within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />. Restore the diesel--generator to OPERABLE status within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> or be in at least-HOT STAND 8Y within the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> and in COLD SHUTDOWN within the following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />.
- c. With one offsite A.C. circuit and one diesel generator of the above required A.C. electrical power sources inoperable, demonstrate the OPERABILITY of the remaining offsite A.C. circuit by performing Surveillance Requirement 4.8.1.1.la within I 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 generater became inoperable due to any cause other than preplanned preventive maintenance or -
testing, demonstrate the OPERABILITY of the remaining OPERABLE diesel generator by performing Surveillance Requirement 4.8.1.1.2a.4 within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> (unless it is already operating). Restore at least one of the inoperable sources to OPERABLF statut within 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> or be in 9507280209 950726 PDR ADOCK 05000382 WATERFORD - UNIT 3 3/43-1 AMENDMENT NO. Gh 92
, 3/4.8 ELECTRICAL POWER SYSTEMS l t
. BASES 3/4.8.1. 3/4.8.2. and 3/4.8.3 A.C. SOURCES. D.C SOURCES. and DNSITE POWER l 1 DISTRIBUTION SYSTEMS l
The OPERABILITY of the A.C. and D.C. pcwer sources and associated distribution i 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 l 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 Criterion 17 of Appendix A to 10 CFR Part 50.
The Limiting Condition for Operation (LCO) ensures that each diesel generator storage tank contains fuel oil of a sufficient volume to operate each diesel generator for_a period of 7 days. The minimum required volume is 6ased on the time-dependent loads of the diesel generator following a loss of offsite power and a design bases accident and includes the capacity to power the engineered safety features in conformance with Regulatory Guile 1.137 October 1979., The minimum onsite stored fuel oil is sufficient to cperate the diesel generator for a period longer than the time to replenish the onsite supply from the outside sources discussed in FSAR 9.5.4.2.
An additional provision is included in the LCO which allow the diesel generators to remain operable when their 7 day fuel oil supply is not available. This ,
provision is acceptable on the basis that replacement fuel oil is onsite within i the first 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> after falling below the 7 day supply.
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 safety analyses and are based upon maintaining at least one redundant set of onsite A.C. and D.C. power sources and i 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 A.C. and D.C. source allowable out-of-service times are based on Regulatory Guide 1.93, " Availability of Electrical Power Sources," December 1974.
When one diesel generator is inoperable, there is an additional ACTION requirement to verify that all required systems, subsystems, trains, components, and devices that depend on the remaining OPERABLE diesel generator as a source of emergency power are also OPERABLE, and that the steam-driven auxiliary feedwater pump is 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 this context means to administratively 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.
The OPERABILITY of the minimum specified A.C, and D.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) sufficient instrumentation and control capability is available for monitoring and maintaining the unit status.
WATERFORD - UNIT 3 B 3/4 8-1 AMENDMENT NO. 92
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NPF-38-169 ATTACHMENT B l
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E3/4.8' ELECTRICAL POWER SYSTEMS- :i
.. .y 1 3/4.8.1 A.C. SOURCES 4 \
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% , OPERATING c]
. LIMITING CONDITION FOR 0PERATION j
-)
i3.8.1.1 As' a minimum, the following A.C. electrical' power sources shall be OPERABLE: -l a'. Two physically independent circuits between the' offsite transmission network i and the Onsite Class'1E distribution system, and . l
- b. Two separate and independent diesel generators, each with: !
, 1, Diesel oil feed tanks containing a minimum volume of 339 gallons of !
fuel. and !
- 2. A separate diesel generator fuel oil storage tank containing: i
- a. A minimum volume of 38.760 gallons of fuel, or- 'i
- b. A fuel oil volume less than 38.760 gallons and greater than ;
38,000 gallons of fuel for a period not to exceed 5 days .j (provided replacement fuel oil is onsite within the first 48 l hours), and ;
- 3. A separate fuel transfer pump. !
APPLICABILITY: MODES 1. 2, 3, and 4. !
ACTION:
- a. With one offsite circuit of 3.8.1.la inoperable, . demonstrate the OPERABILITY of the remaining A.C. circuit by performing Surveillance Requirements 4.8.1.1.la. ;
within I 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. If either diesel j generator has not been successfully tested within the past 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />, 1 demonstrate its OPERABILITY by performing Surveillance Requirement jl 4.8.1.1.2a.4 separately for each diesel generator (unless it is already. -
operating) within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />. Restore the offsite A.C. circuit to OPERABLE ' !
status within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> or be in at -least HOT STANDBY within the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> - ;j and in COLD SHUTDOWN withir. the following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />.
- b. With one diesel generator of 3.8.1.lb inoperable,- demonstrate the OPERABILITY of the remaining A.C. Circuits by performing Surveillance Requirements .l 4.8.1.1.la (separately for each offsite A.C. circuit) within 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 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. If the. diesel generator became inoperable l due to any cause other than preplanned preventive maintenance or. testing. l demanstrate the OPERABILITY of the remaining OPERABLE diesel generator (unless < l it has been successfully tested in the last 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />) by performing Surveillance Requirement 4.8.11.'2a.4. within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />. Restore the diesel ,
l generator to OPERABLE status within M-heur+- 7 days or be in at least HOT d STANDBY within the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> and in COLD SHUTDOWN within the following 30 i
. hours. !
NOTE: On a once per refuelino cycle frequency, the restoration time for the i required action may be extended to 10 days- )
i c, .With one offsite A.C. circuit and one diesel generator of the above required' ')
A.C. electrical power sources inoperable. demnstrate the OPERABILITY of the :;
remaining offsite A.C. circuit by performing Surveillance Requirement , 4.8.1.1.la within I 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 j diesel generator became inoperable due to any cause other than preplanned j preventive maintenance or testing, demonstrate the-OPERABILITY of the ;
I l
. . 3/4.8 ELECTRICAL POWER SYSTEMS
, BASES 3/4.8.1,3/4J.2,and3/4.8.3A.C. SOURCES.D.CSOURCES,andONSITEPOWER DISTRIBUTION SYSTEMS The OPERASILITY 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 independent and redundant A.C. and D.C. power sources and distribution systems satisfy the requirements of General Design Criterion 17 of Appendix A to 10 CFR Part 50.
The Limiting Condition for Operation (LCO) ensures that each diesel generator storage tank contains fuel oil of a sufficient volume to operate each diesel generator for a period of 7 days. The minimum required volume is based on the time-dependent loads of the diesel generator following a loss of offsite power and a design bases accident and includes the capacity to power the engineered safety features in conformance with Regulatory Guide 1.137 October 1979. The minimum onsite stored fuel oil is sufficient to operate the diesel generator for a period longer than the time to replenish the onsite supply from the outside sources discussed in FSAR 9.5.4.2.
An additional provision is included in the LCO which allows the diesel generators to remain operable when their 7 day fuel oil supply is not available. This provision is acceptable on the basis that replacement fuel oil is onsite within the first 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> after falling below the 7 day supply.
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 safety analyses and are based upon maintaining at least one redundant set of 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 A.C. and D.C. source allowable out-of- service times are based on Regulatory Guide 1.93. " Availability of Electrical Power Sources," December 1974 and Conbustion Engineering Owners Group (CEOG) Joint Applications Report for Emergency Diesel Generators ADT Extension: report Number CE NPSD 996. When one diesel generator is inoperable, there is an additional ACTION requirement to verify that all required systems, subsystems trains, components, and devices that depend on the remaining OPERABLE diesel generator as a source of emargency power are also OPERABLE, and that the steam-driven auxiliary feedwater pump is 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 this context means to administratively 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.
'The OPERABILITY of the minimum specified A.C. and D.C. power sources and associated i 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) sufficient instrumentation and control capability is available for monitoring and maintaining the unit status.
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