ML20138G689
| ML20138G689 | |
| Person / Time | |
|---|---|
| Site: | Grand Gulf  |
| Issue date: | 10/12/1985 |
| From: | Thompson H Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML20138G694 | List: |
| References | |
| TAC-59536, NUDOCS 8510250581 | |
| Download: ML20138G689 (13) | |
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UNITED STATES 3.,~,
g NUCLEAR REGULATORY COMMISSION g
.j WASHINGTO N, D. C. 20555
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MISSISSIPPI POWER & LIGHT COMPANY MIDDLE SOUTH ENERGY, INC.
SOUTH MISSISSIPPI ELECTRIC POWER ASSOCIATION DOCKET NO. 50-416 GRAND GULF NUCLEAR STATION, UNIT 1 AMENDMENT TO FACILITY OPERATING LICENSE Amendment No. 5 l
License No. NPF-29 1.
The Nuclear Regulatory Comission (the Comission) has found that:
A.
The application for amendment to the Grand Gulf Nuclear Station, Unit 1 (the facility) Facility Operating License No. NPF-29 filed by the Mississippi Power and Light Company acting for itself, Middle South Energy, Inc., and South Mississippi Electric Power Association (the licensees), dated August 23, 1985, and supplemented September 25 and October 5, 1985, complies with the standards and requirements of the Atomic Energy Act of 1954, as amended (the Act) and the Commission's regulations as set forth in 10 CFR Chapter I; B.
The facility will operate in conformity with the application, as amended, the provisions of the Act, and the regulations of the Commission; C.
There is reasonable assurance; (i) that the activities authorized by this amendment can be conducted without endangering the health and safety of the public, and (ii) that such activities will be conducted in compliance with the Commission's regulations set forth in 10 CFR Chapter I; D.
The issuance of this license amendment will not be inimical to the common defense and security or to the health and safety of the public; E.
The issuance of this license amendment is in accordance with 10 CFR Part 51 of the Commission's regulations and all applicable requirements have been satisfied.
8510250501 851012 DR ADOCK 050 6
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Accordingly, Facility Operating License NFi-?9 is amended as 'follows:
A.
Change paragraph 2.C.(20) to read as follows:
(20) Standby Service Water System (Section :s.2.1 SER, SSER #2) i No irradiated fuel may be stoN a in the Unit 1 spent fuel pool prior to completion of modifications to the standby service water (SSW) system and verification that the design flow can be achieved to all SSW system components. However, should a core offloading be necessary prior to completion of these modifications (scheduled for the first scheduled refuel-ing outage), irradiated fuel may be placed in the spent fuel 4
pool when the RHR system operating in the spent fuel pool cooling mode is available. Until the SSW system is modified, the spent fuel pool cooler shall be isolated from the SSW system by locked closed valves or the associated SSW subsystem shall be declared inoperable. The position of these valves shall be verified every 31 days until the design flowrate for SSW system is demonstrated.
The surveillance to be perfomed is to verify the valves are locked closed and to verify that any SSW loop with valves which
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are not locked closed is declared inoperable.
B.
Add paragraph 2.C.(40) to read as follows:
(40) Temporary Ultimate Heat Sink Change With the plant in OPERATIONAL condition 4, SSW cooling tower i
basin A may be considered OPERABLE in accordance with Technical Specification 3.7.1.3 with less than a 30 day supply of water (without makeup) during the time that SSW basin B is drained a
to replace its associated service water pump provided:
(a) SSW basin A water level is maintained greater than or equal to 87".
(b) At least two sources of water (other than normal makeup with one source not dependent on offsite power) are available for makeup to SSW basin A.
This license condition may remain in effect until plant startup following the outage scheduled for fall 1985.
3.
The license is further amended by page changes to the Technical Specifications as indicated in the attachment to this license amendment. Paragraph 2.C.(2) of Facility.0perating License NPF-29 is hereby amended to read as follows:
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(2) The Technical Specifications contained in Appendix A, as revised i
through Amendment No.5 and the Environmental Protection Plan contained
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in Appendix B are hereby incorporated into this license. Mississippi Power & Light Company shall operate the facility in accordance with the Technical Specifications and the Environmental Protection Plan.
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This license amendment is effective as of its date of issuance.
FOR THE NUCLEAR REGULATORY COMMISSION i
H 'g L. Thompso r.
rector Office of Nuclear Reactor Regulation i ision of Licensing
Enclosure:
Technical Specification Changes Date of Issuance: October 12, 1985 i
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ATTACHMENT TO LICENSE AMENDMENT N0. 5 FACILITY OPERATING LICENSE NO. NPF-29 DOCKET NO. 50-416 Replace the following pages of the Appendix "A" Technical Specifications with the enclosed pages. The revised pagr s are identified by Amendment number and contain vertical lines indicating the areas of change.
The corresponding over-leaf pages are also provided to maintain document completeness.
Amended Overleaf Page Page 3/4 7-4 3/4 7-3 3/4 8-1 3/4 8-2 3/4 8-9 3/4 8-10
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B 3/4 8-1 B 3/4 8-2 B 3/4 8-la i
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PLANT SYSTEMS HIGH PRESSURE CORE SPRAY SERVICE WATER SYSTEM l
LIMITING CONDITION FOR OPERATION 3.7.1.2 The high pressure core spray (HPCS) service water system shall be OPERABLE with:
a.
One OPERABLE HPCS service water pump, and b.
An OPERABLE flow path capable of taking suction from the associated SSW cooling tower basin and transferring the water through the HPCS service water system heat exchangers.
APPLICABILITY: OPERATIONAL CONDITIONS 1, 2, 3, 4*, and 5*.
ACTION:
j With the HPCS service water system inoperable, declare the HPCS system inoperable
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and take the ACTION required by Specification 3.5.1 or 3.5.2, as applicable, and declare the associated diesel inoperable and take the ACTION required by Speci-fication 3.8.1.1 or 3.8.1.2.
SURVEILLANCE REQUIREMENTS 1
i 4.7.1.2 The HPCS service water system shr.ll be demonstrated OPERABLE:
a.
At least once per 31 days by verifying that each valve, manual, power operated or automatic, servicing safety related equipment that is not locked, sealed or otherwisr. secured in position, is in its correct position.
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b.
At least once per 18 months during shutdown by verifying that each automatic valve servicing safety-related equipment actuates to its correct position on a service water actuation test signal.
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a When the HPCS system is required to be OPERABLE.
GRAND GULF-UNIT 1 3/4 7-3
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PLANT SYSTEMS ULTIMATE HEAT SINK LIMITING CONDITION FOR OPERATION 3.7.1.3 At least the following independent SSW cooling tower basins, each with:
a.
A minimum basin water level at or above elevation 130'3" Mean Sea Level, USGS datum, equivalent to an indicated level, of > 87".
b.
Two OPERABLE cooling tower fans,#
shall be OPERABLE:
In OPERATIONAL Condition 1, 2 and 3, two basins,##
a.
In OPERATIONAL Condition 4, 5 and *, the basins ## associated with systems b.
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and components required OPERABLE by Specifications 3.7.1.1 and 3.7.1.2.
APPLICABILITY: OPERATIONAL CONDITIONS 1, 2, 3, 4, 5 and *.
ACTION:
a.
In OPERATIONAL CONDITION 1, 2, 3, 4, 5 and
- with one SSW cooling
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tower basin inoperable, declare the associated SSW subsystem inoperable and, if applicable, declare the HPCS service water system inoperable, and take the ACTION required by Specifications 3.7.1.1 and 3.7.1.2, as applicable.
b.
In OPERATIONAL CONDITION 1, 2, 3, 4 or 5 with both SSW cooling tower basins inoperable, declare the SSW system and the HPCS service water
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system inoperable and take the ACTION required by Specifications 3.7.1.1 and 3.7.1.2.
c.
In Operational Condition
- with both SSW cooling tower basins inoperable, declare the SSW system inoperable and take the ACTION required by Specification 3.7.1.1.
The provisions of Specification 3.0.3 are not applicable.
SURVEILLANCE REQUIREMENTS 4.7.1.3 At least the above required SSW cooling tower basins shall be deter-mined OPERABLE at least once per:
a.
24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> by verifying basin water level to be greater than or equal i
to 87".
b.
31 days by starting from the control room each SSW cooling tower fan not c1 ready in operation and operating each fan for at least 15 minutes.
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18 months by verifying that each SSW cooling tower fan starts auto-matically when the associated SSW subsystem is started.
When handling irradiated fuel in the primary or secondary containment.
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- The basin cooling tower fans are not required to be OPERABLE for HPCS service water system OPERABILITY.
GRAND GULF-UNIT 1 3/4 7-4 Amendment No. 5 l
3/4.8 ELECTRICAL POWER SYSTEMS 3/4.8.1 A.C. SOURCES A.C. SOURCES - OPERATING LIMITING CONDITION FOR OPERATION 3.8.1.1 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 1E distribution system, and b.
Three separate and independent diesel generators, each with:
1.
Separate day fuel tanks containing a minimum of 220 gallons of fuel.
2.
A separate fuel storage system containing a minimum of:
a) 57,200 gallons of fuel each for diesel generators 11 and l
12, and b) 39,000 gallons of fuel for diesel generator 13.
3.
A separate fuel transfer pump.
APPLICABILITY: OPERATIONAL CONDITIONS 1, 2, and 3.
ACTION:
a.
With either one offsite circuit or diesel generator 11 or 12 of the above required A.C. electrical power sources inoperable, demonstrate the OPERABILITY of the remaining A.C. sources by performing Surveil-lance Requirements 4.8.1.1.1.a within one hour and 4.8.1.1.2.a.4,*
for one diesel generator at a time, within two hours 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; restore at least two offsite circuits and diesel generators 11 and 12 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 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 />, b.
With one offsite circuit and diesel generator 11 or 12 of the above required A.C. electrical power sources inoperable, demonstrate the OPERABILITY of the remaining A.C. sources by performing Surveillance Requirements 4.8.1.1.1.a within one hour and 4.8.1.1.2.a.4,* for one diesel generator at a time, within two hours 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; restore at least one of the inoperable A.C.
sources to OPERABLE status within 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> or be in at least HOT SHUT-DOWN 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 SHUTOOWN within the following 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.
Restore at least two offsite circuits and diesel genera-tors 11 and 12 to OPERABLE status within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> from 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 />.
" Specification 4.8.1.1.2.a.4 must be performed for diesel generator 13 only when the HPCS system is OPERABLE.
GRAND GULF-UNIT 1 3/4 8-1 Amendment No.
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ELECTRICAL POWER SYSTEMS LIMITING CONDITION FOR OPERATION (Continued)
ACTION (Continued) c.
With either diesel generator 11 or 12 of the above required A.C.
electrical power sources inoperable, in addition to ACTION a or b above, as applicable, 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 diesel generator 11 or 12 as a source of emergency power are also OPERABLE; otherwise, be in at least HOT SHUTOOWN 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 two of the above required offsite circuits inoperable, demonstrate the OPERABILITY of three diesel generators by perfcrming Surveillance Requirement 4.8.1.1.2.a.4*, for one diesel generator at a time, within two hours 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 /> thereaf ter, unless the diesel generators are already operating; restore at least one of the inoperable offsite circuits to OPERABLE status within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> or be in at least H0T SHUTDOWN within the next 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />.
With only one offsite circuit restored to OPERABLE status, restore at least two offsite circuits to OPERABLE status within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> from 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 />.
e.
With diesel generators 11 and 12 of the above required A.C.
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electrical power sources inoperable, demonstrate the OPERABILITY of the remaining A.C. sources by performing Surveillance Requirements 4.8.1.1.1.a within one hour and 4.8.1.1.2.a.4*, within two hours 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; restore at least one of the in-operable diesel generators 11 and 12 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 />.
Restore both diesel genera-tors 11 and 12 to OPERABLE status within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> from 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 SHUT 00WN within the following 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.
f.
With diesel generator 13 of the above required A.C. electrical power sources inoperable, demonstrate the OPERABILITY of the remaining A.C. sources by performing Surveillance Requirements 4.8.1.1.1.a within one hour and 4.8.1.1.2.a.4, for one diesel generator at a time, within two hours 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 /> thereaf ter; restore the inoperable diesel generator 13 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 declare the HPCS system inoperable and take the ACTION required by Specification 3.5.1.
^ Specification 4.8.1.1.2.a.4 must be performed for diesel generator 13 only when the HPCS system is OPERABLE.
I GRAND GULF-UNIT 1 3/4 8-2
ELECTRICAL POWER SYSTEMS A.C. SOURCES - SHUTOOWN LIMITING CONDITION FOR OPERATION 3.8.1.2 As a minimum, the following A.C. electrical power sources shall be OPERABLE:
a.
One circuit between the offsite transmission network and the onsite Class IE distribution system, and b.
Diesel generator 11 or 12, and diesel generator l' when the HPCS system is required to be OPERABLE, with each diesel generator having:
1.
A day tank containing a minimum of 220 gellons of fuel.
2.
A fuel storage system containing a minimum of:
a) 57,200 gallons of fuel for each OPERABLE diesel generator 11 l
or 12.
b) 39,000 gallons of fuel for diesel generator 13.
3.
A fuel transfer pump.
APPLICABILITY:
OPERATIONAL CONDITIONS 4, 5 and *.
ACTION:
a.
With all offsite circuits inoperable and/or with diesel generators 11 and 12 inoperable, suspend CORE ALTERATIONS, handling of irradiated fuel in the primary or secondary containment, operations with a potential for draining the reactor vessel and crane operations over the spent fuel storage pool and the upper containment pool when fuel asser.blies are stored therein.
In addition, when in OPERATIONAL CONDITION 5 with the water level less than 22 feet 8 inches above the reactor pressure vessel flange, immediately initiate corrective action to restore the required power sources to OPERAPLE status as soon as practical.
b.
With diesel generator 13 inoperable, restore the inoperable diesel
. generator 13 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 declare the HPCS system inoperable and take the ACTION required by Specification 3.5.2 and 3.5.3.
c.
The provisions of Specification 3.0.3 are not applicable.
SURVEILLANCE REQUIREMENTS 4.8.1.2 At least the above required A.C. electrical power sources shall be demonstrated OPERABLE per Surveillance Requirements 4.8.1.1.1, 4.8.1.1.2 and 4.8.1.1.3, except for the requirement of 4.8.1.1.2.a.5.
- When handling irradiated fuel in the primary or secondary containment.
GRAND GULF-UNIT 1 3/4 8-9 Amendment No. 5 l
t ELECTRICAL POWER SYSTEMS 3/4.8.2 D.C. SOURCES r
D.C. SOURCES - OPERATING LIMITING CONDITION FOR OPERATION 3.8.2.1 As a minimum, the following D.C. electrical power sources shall be OPERABLE:
i a.
Division 1, consisting of:
1.
125 volt battery 1A3.
2.
125 volt full capacity charger 1A4 or 1AS.
b.
Division 2, consisting of:
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125 volt battery 183.
2.
125 volt full capacity charger 184 or 185.
c.
Division 3, consisting of:
1.
125 volt battery IC3.
2.
125 volc full capacity charger 1C4.
APPLICABILITY:
OPERATIONAL CONDITIONS 1, 2 and 3.
f ACTION:
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a.
With either Division 1 battery or Division 2 battery of the above required D.C. electrical power sources inoperable, restore the inoperable division battery 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 />, b.
With Division 3 battery of the above required D.C. electrical power sources inoperable, declare the HPCS system inoperable and take the ACTION required by Specification 3.5.1.
c.
With one of the above required full capacity chargers inoperable, demonstrate the OPERABILITY of its associated battery bank by performing Surveillance Requirement 4.8.2.1.a.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.
If any Category A limit in Table 4.8.2.1-1 is not met, declare the battery inoperable.
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3/4.8 ELECTRICAL POWER SYSTEMS l
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BASES 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 dering 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 con-ditions within the facility.
The minimum specified independent and redundant A.C. aad D.C. power sources and distribution systems satisfy the requirements of General Design Criterion 17 of Appendix "A" to 10 CFR 50.
The volume of i
fuel specified for each fuel storage system represents usable fuel.
The ACTION requirements specified for the levels of degradation of the power sources provide restriction upon continued facility operation commen-surate 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 Division 1 or 2 of the onsite A.C. and j
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.
Division 3 supplies the high pressure core spray (HPCS) system only.
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 i
l 1974. When diesel generator 11 or 12 is inoperable, there is an additional ACTION requirement to verify that all required systems, subsystems, trains, 1
components and devices, that depend on the remaining OPERABLE diesel genera-tor 11 or 12 as a source of emergency power, are also OPERABLE.
This require-ment is intended to provide assurance that a loss of offsite power event will t
not result in a complete loss of safety function of critical systems during the period diesel generator 11 or 12 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 main-i tenance or other reasons.
It does not mean to perform the surveillance requirements needed to demonstrate the OPERABILITY of the component.
i 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.
The surveillance requirements for demonstrating the OPERABILITY of the diesel generators are in accordance with the recommendations of Regulatory Guide 1.9, " Selection of Diesel Generator Set Capacity for Standby Power Sup-plies," March 10, 1971, 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 Systems for Standby Diesel Generators," January 1978, as addressed in the FSAR, except that Division 1 and 2 diesel generator load testing requirements that were GRAND GULF-UNIT 1 B 3/4 8-1 Amendment No. 5 l
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I ELECTRICAL POWER SYSTEMS 1
BASES i
A.C. SOURCES, D.C. SOURCES and ONSITE POWER DISTRIBUTION SYSTEMS (Continued) j restricted as noted in a letter from E. G. Adensam to L./F. Dale, dated 17 July
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1 1984.
The SSW pump load values are not used as the largest single load rejected j
from the diesel generators when testing to meet the requirements of Regulatory l
Guide 1.9.
Since the SSW system supplies cooling water to its associated diesel generator, tripping the SSW pump to perform this test would result in loss of 4
the diesel generator.
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I GRAND GULF-UNIT 1 8 3/4 8-la Amendment No. 5 l
ELECTRICAL POWER SYSTEMS I
BASES A.C. SOURCES, D.C. SOURCES and ONSITE POWER DISTRIBUTION SYSTEMS (Continued)
The surveillance requirements for demonstrating the OPERABILITY of the unit batteries are in accordance with the recommendations of Regulatory Guide 1.129 " Maintenance Testing and Replacement of Large Lead Storage Batteries for Nuclear Power Plants," February 1978, and IEEE Std 450-1980, "IEEE Recommended Practice for Maintenance, Testing, and Replacement of Large Lead Storage Batteries for Generating Stations and Substations.".
Verifying average electrolyte temperature above the minimum for which the
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battery was sized, total battery terminal voltage onfloat charge, connection resistance values and the performance of battery service and discharge tests ensures the effectiveness of the charging system, the ability to handle high discharge rates and compares the battery capacity at that time with the rated capacity.
Table 4.8.2.1-1 specifies the normal limits for each designated pilot cell and each connected cell for electrolyte level, float voltage and specific gravity.
The limits for the designated pilot cells float voltage and specific gravity, greater than 2.13 volts and 0.015 below the manufacturer's full charge specific gravity or a battery charger current that had stabilized at a low value, is characteristic of a charged cell with adequate capacity.
The normal limits
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for each connected cell for float voltage and specific gravity, greater than i
2.13 volts and not more than 0.020 below the manufacturer's full charge specific l
gravity with an average specific gravity of all the connected cells not more than 0.010 belcw the manufacturer's full charge specific gravity, ensures the OPERABILITY and capability of the battery.
Operation with a battery cell's parameter outside the normal limit but within the allowable value specified in Table 4.8.2.1-1 is permitted for up to 7 days. During this 7 day period:
(1) the allowable values for electrolyte level ensures no physical damage to the plates with an adequate electron transfer capability; (2) the allowable value for the average specific gravity of all the cells, not more than 0.020 below the manufacturer's recommended full charge specific gravity, ensures that the decrease in rating will be less than the safety margin provided in sizing; (3) the allowable value for an individual cell's specific gravity ensures that an individual cell's specific gravity will not be more than 0.040 below the manufacturer's full charge specific gravity i
and that the overall capability of the battery will be maintained within an I
acceptable limit; and (4) the allowable value for an individual cell's float voltage, greater than 2.07 volts, ensures the battery's capability to perform its design function.
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I GRAND GULF-1 B 3/4 8-2