ML20118B679
| ML20118B679 | |
| Person / Time | |
|---|---|
| Site: | River Bend  |
| Issue date: | 09/29/1992 |
| From: | Black S Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML20118B680 | List: |
| References | |
| NUDOCS 9210060426 | |
| Download: ML20118B679 (11) | |
Text
'
'o UNITED STATES
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NUCLE AR REGULATORY COMMISSION 3,7 W ASHING T ON, D. C. 20bb5
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Mjf_ STATES UTillTIES COMPANY DOCKET NO. 50-4}3 fuVER _ BEND STAIJ0N. UNIT 1 AMENDMENT TO FACILITY OPERATING LICENSE Amendment No.64 License No. NPF-47 1.
The Nuclear Regulatory Commission (the Commission) has found that:
A.
The application for amendment by Gulf States Utilities Company (the licensee) dated May 2, 1989, complies with the standards and quirements of the Atomic Energy Act of 1954, as amended (the Act),
1 and tha Commission's ruler and regulations set forth in 10 CFR Chapter l i B.
The facility will operate in conformity with the application, as amended, the provisions of the Act, and the rules and 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 wiil be conducted in compliance with the Commission's regulations; 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; and E.
The issuance of chis amendment is in accordance with 10 CFR Part 51 of the Commission's regulations and al' applicable requirements have been satisfied.
9210060426 920929 PDR ADOCK 00000450 P
1 2.
Accordingly, the licc.1se is amended by changes to the Ternhical Specifications as indicated in the attachment to this license amendment and Paragraph 2.C.(2) of facility Operating License No. NPF-47 is hereby amended to read as follows:
(2) Technical Specifications and Environmen*al Protection Plan The Technical Specifications contained in Appendix A, as revised through Amendment No. 64 and the Environmer.tal Protection Plan contained in Appendix B, are hereby incorporated in the license.
GSU shall operate the facility in accordance with the Technical Specifications and the Environmen'al Protection Plan.
r 3.
The license amendment is effective as of its date of issuance.
FOR THE NUCLEAR REGULATORY COMMISSION l
s Suzanne C. Black, Director Project Directorate IV-2 Division of R'; actor Projects !!'/IV/V Office of Nuclear Reactor rec.lation
Attachment:
Changes to the Technical Specifications Date of Issuance: September 29, 1992 m
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a ATTACHMEUT TO LICENSE AMENDMENT NO. 64 FACILITY OPERATING LICENSE NO. NPF-47 DOCKET NO. 50-458 Replace the following pages of the Appendix "A" lechnical Specifications with the enclosed pages.
The revised pages are identified by Amendment number and contain vertical lines indicating the areas of change.
The overleaf pages are provided to maintain document completeness.
REMOVE INSERT 3/4 8-1 3/4 8-1 3/4 8-2 3/4 8-2 3/4 8-3 3/4 8-3 8 3/4 8-1 B 3/4 8-1 B 3/4 8-2 B 3/4 B-2 B 3/4 8-3 8 3/4 8-3 B 3/4 8-4 1
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3/4.8 Et[C'id1 CAL POWER SYSTEMS 3/4.8.1 A.C. SqQRCLS A.C. SOURCES - OPERalll(G llMITING CONDITION FOR OPERATION 3.8.1.1 As a minimum, the following A.C. electrical power sources shall be OPERABLE:
a.
Two physically independent cire'its between the offsite transmission network and the onsite Class IE distribution system, and b.
n cee separate and independent diesel generators, each with:
1.
A sr;. ate day fuel tank containing a minimum of 316.3 gallons of tuel, 2.
A separate fuel storage system containing a minimum of 45,495 gallons of fuel, and 3.
A separate fuel transfer pump.
AEELICABillTY: OPERATIONAL CONDITIONS 1, 2, AND 3.
ACTION:
a.
With one offsite circuit of the above-required AC electrical power sources inoperable, demonstrate the OPERABILITY of the remaining AC sources by performing Surveillance Requirement 4.8.1.1.1.a 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.
Restore the offsite circuit to OPERABLE status within 72 tours 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 either diesel generator lA or IB inoperable, demonstrate the OPERABillTY nf the above required AC offsite sources by performing Surveillance Requirement 4.8.1.1.1.a 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 maintenance or testing, l
within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> *, for each OPERABLE diesel generator separately, either verify that the cause of the diesel generator being inoperable does not impact the OPERABILITY of the OPERABLE diesel generator or perform Surveillance Requirement 4.8.1.
1.a.4.
Restore the inoperable diesel generaur to 0;ERABLE 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 />.
'This is required to be completed regardless of when the inoperable diesel l
generator is restored to OPERABLE.
RIVER BEND - UNIT 1 3/4 8-1 Amendment No. 64
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LLL(lRl(_Al POWER SYSTEMS QMITING_(DNDITj0NFOROPERATION(Continued)
A(l[M (Continued) c.
With one offsite circuit of the above-required AC sources and diesel generator IA or 1B of the above required AC eier.trical power sources inoperable, demonstrate the OPERABILITY of the remaining AC sources by performing Surveillance Requirement 4.8.1.1.1.a 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 a diesel generator became inoperable due to any cause other than preplanr.ed maintenance or l
testing, within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> *, for each OPERATJLE diesel generator separately, either verify that the cau.e of the diesel generator being inoperable does not impact the OPER%BILITY of the OPERABLE diesel generator or perform Surveillence Requirement 4.8.1.1.2.a.4, Restore at least one of the inoperable AC 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 leas', 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 at least two offsite circuits and diesel generators lA and 18 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 HDT SHU100WN 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 diesel generator 10 of the above required AC electrical power sources inoperable, demonstrate the OPERABILITY of the offsite AC sources by performing Surveillance Requirement 4.8.1.1.1.a within i hout and at least once per 0 hours0 days <br />0 hours <br />0 weeks <br />0 months <br /> thereafter.
If the diesel oenerator became inoperable as a result of any cause other than preplanned maintenance or testing, within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> *, for each OPERABLE diesel generator separately, either verify that the cause of the diesel generator being inonerable does not impact the OPERABillTY of the OPERABLE diesel generator nr perform Surveillance Requirement 4.8.1.1.2.a.4.
Restore diesel generator IC 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 and the C SSW pump inoperable and take the ACTION required by Specifications 3.5.1 and 3.7.1.1.
e.
With diesel generator IA or IB of the above required AC electrical power sources inoperable, in addition to taking ACTION b or c, 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,equired redundant j
systems, subsystems, trains, components and devices that depend on the remaining GPERABLE diesel generator as a source of emergency power are ahn OPERABLE, and that tH C standby service t".ter pump is OPERABLE if diesel generator IB is inoperable; otherwise, either declare coperable the redundant systems, subsvstems, trains, comnonents and devices served by the inoperable diesel generator and take the ACTION required by the associated Specification (s) for both divisional components 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 inthin the following 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.
'TEis is required to be completed regardless of when the inoperable diesel j
generator is restored to OPERABILITY, Amendm nt No. 64 RIVER BEND - UNIT 1 3/4 8-2 e
((LCTRICAL POWER SYSTEMS (IMITING CONDITION FOR OPERATION (Continued)
Afl1QU (Continued) f.
With both of the above required offsite circuits inoperable, restore l
at least one of the above-required 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 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 />. With only one offsite circuit restored to OPtRAB i status, restore at least two offsite circuits to OPERABLE stutus i
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 SHUIDOWN 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 />.
l-g.
With diesel generators lA and IB of the above required AC electrical power sources inoperable, demonstrate the OPERABILITY of the remair,ing AC sources by performing Surveillance Requirement 4.8.1 1.1.a within I hour and at least once per B hours thereafter and within 8 acurs* either verify that the cause(s) of diesel generators It nd IB being inoperable do not impact the OPERABILITY of diesel genee. tor IC or perform Surveillance Requirement 4.8.1.1.2.a.4 for diesel generator 10.
Restore at least one of the inoperable diesel generators lA and IB to OPERABLE status within 2 haurs or be in at least HOT SHUTDOWN witnin 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 generators IA and IB 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 SHUTOOWN within the following 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.
h.
With one offsite circuit of the above-required AC electrical ~ power sources inoperable and diesel ger.erator 1C inoperabic, apply the requirements of ACTION statements a and d specified above.
i.
With either diesel generator IA or IB inoperable and diesel generator IC inoperable, apply the requirements of ACTION statements b, d and e specified above.
'TErs is required to be completed regardless of when the inoperable diceal l
generator is testored to OPERABILITY.
RIVER BEND UNIT 1 3/4 8-3 Amendment No. 64
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,E,,LECTRICAL POWER SYSTEMS SURVEILLANCE RECUIREMENTS t
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4.8.1.1.1 Each of the above required independent circuits between the offsite transmission network and the cnsite Class 1E distsibution systerr. shall be:
At least once per 7 days, determined OPERABLE L/ verifying correct a.
breaker alignments and indicated power availability, and b.
At least once per 18 months, demonstrated OPERABLE, during shutdown, by manually transferring unit power supply from the normal circuit to the alternate circuit.
i 4.8.1.3.2 Each of the above required diesel generators shall be demonstrated i
In accordance with the frequency specified in Table 4.8.1.1.2-1 on a i
a.
STAGGERED TEST BASIS by:
1.
Verifying the fuel level in the day fuel tank.
2.
Verifying the fuel level in the tuel storage tank.
3.
Verify ng the fuel transfer pump starts and transfers fuel from i
the storage system to the day fuel tank.
4.
a)
For diesel generators 1A and IB, verifying the diesel starts"; from ambient condition and accelerates to at least 450 rpm in less than or equal to 10 seconds.
The qenerator voltage and frequency shall be 4160 1 420 volts e.nc 60 i j
1.2 Hz within 10 seconds Jf ter the start signal.
4 b)
For diesel generator 10, verifying the diesel starts ** from ambient condition and accelerates to at least 882 rpm in less than or equal to 10 secondt.
Ike generator voltage and frequency shall not exceed a maximum of 5400 volts and g
66.75 Hz and shall be 4160 1 420 volts and 60 t 1.2 Hz within 13 seconds.
5.
Verifying'the diesel generator is synchronized, loaded to 3000-3100 kw'** for diesel generators 1A and IB ar.d 2500-2600 kw'**
for diesel generator IC in less than or equal to 60 seconds",
and operates with this load for at least 60 minutes.
- All diesel generator starts for the purpose of this surveillance test may be preceded by an engine prelube period.
Further, all surveillance tests, with the exception of once per 184 days, may also be preceded by warmup procedures and may also include gradual loading (>150 bec) as recommended 5
by the tranufacturer 50 that the mechanical stress and wear on the diesel engine is minimized.
- Morrantary transients due to changing bus loads shall not invalidate the test.
RIVER BEND - UNIT 1 3/4 8-4 Amendment No. 63
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__._m 3/4.8 EJECTRICAL POWLR SYSTEMS J
BASES 314 8.1. 3/4.8.2 and 1/4.8.3 A.C. s0VRCES.
D.C. SOURCES artd ONSITE POWER 1
plSTRIBUTION SYSTEMS The OPERABILITY of the A.C. and D.C. power sources and associated i
distribution systems during operation ensures that sufficient power wi.i be available to supply the safety related equipment requ1*ed for the safe shutdown of the facility and the mitigation and control of accident conditions within the facility.
The minimum specified independent and redundant A.C. and f
D.C. power sources and distribution systems satisfy the requirements of General Design Criterion 17 of Appendix "A" to 10 CFR Part 50.
The ACTION requirements specified for the levels of degradation of the power sources provide restriction upon continued facility operation commensurste 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 OPERABLE at least Division 1 or 11 of the onsite A.C. and D.C. power sources ano associated distribution systems during accident conditions coincident with an assumed loss of offrite power and single failure of the other onsite A.C. or D.C. source.
Division 111 supplies the high pressure core spray (HPCS) system and standby service water pump ISWP*P2C with its auxiliaries.
The A.C. and D.C. source all.wable out-of-service times are bascd on Regulatory Guide 1.93, " Availability of Electrical Power Sources," December 1974, as niodified by plant-specific analysis and diesel generator manufacturer's recommendations.
When diesel generator IA or IB is inoperable, there is an additioul ACTION. requirement to verify that all required systems, subsystems, trains, components and devices, that depend on the remaining i
OPERABLE diesel generator lA or IB as a source of emergency power, are also OPERABLE.
This requirement is intended to provide assurance that a loss of offsite power, durlag the period that diesel generator lA or 1B is inoperable, will not result in a complete loss of safety function of critical systems.
r.ritical systems are those systems that require emergency power to safely shut ov.,n the plant and maintain it in a safe shutdown condition in conjunction with a loss of offsite power.
Equipment which " fails safe" upon a loss of power are not included.
The following systems / subsystem are required to be verified OPERABLE per this ACTION-requirement:
1.
one channel of the accident monitoring drywell and containment-hydrogen concentration analyzer and monitor 2.
two leak detection subsystems per Technical Specification 3.4.3.1 3.
two low pressure ECCS subsystem 4,
one main steam positive leakage control subsystem r
5.
one penetration valve leakage coatrol subsystem 6.
one safety-related primary containment unit cooler 7.
one suppression pool cooling subsystem of RHR 8.
one standby gas treatment system 9.
one shield building annulus mixing subsystem 10.
one fuel building ventilation charcoal filtration subsystem j
11.
one primary containment hydrogen recombiner i
l RIVER BEND - UNIT 1
'B 3/4 8-1 Amendment No. 64
[L((TRICAL_ POWER SYSTEMS BASES A.C. 50VECES. D.C. SOURCLS and DNSITE POWER DISTRIBUTION SYSTEMS (Continued) 12.
one primary containment /drywell hydrogen mixing subsystem 13.
one primary containment /drywell hydrogen ignitor subsystem 14.
one standby service water subsystem with both pumps operable 15.
the standby cooling tower with two fan cells operable 16.
one main control room air conditioning subsystem The above systems / subsystems are reouired to be capable of being powered by the OPERABLE diesel generatur lA or 18.
Systems whose ACTION reautrements are 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> or longer for a complete loss of its safety function are not included on the above list.
Continued plant operation is limited to 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> with diesel generator lA or IB inoperable.
The term verify, as used in 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.
When a diesel generator becomes inoperable due to any cause other than preplanned maintenance or testing, there is a requirement in the ACTION to, for each OPERABLE diesel generator separately, either verify that the cause of the diesel generator being inoperable does not impact the OPERABillTY of the OPERABLE diesel generator or perform Surveillance Requirement 4.8.1.1.2.a.4.
The term verify in this context means to determine by visual iilspection, functional test or other means that the subsystem wili perform its function, f,e diescl generators made by different manufacturers, this verification may consist of a determination that the cause cannot exist if the comparable subsystem is of a different derign.
The OPERABILITY of the miniaJm specified A.C. and 0.C. power sources and associated distribution systems, during shutdown and refueling, ensures that the facility can be maintained in the shutdown or refueling condition for extended time periods and 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 Supplies," March 10, 1971, and Regulatory Guide 1.108, " Periodic Testing of Diesel Generator Units Used as Onsite Electric Power Systems at Nuclear Power Plants," Revision 1, August 1977, as modified by plant-specific analysis and diesel generator manufacturer's recommendations.
Generic Letter 84-15 prescribed increasing the surveillance test frequency where previous testing indicated a reliability of less than or equal to 0.95, demand until restored reliability was demonstrated, it also considered a prescriptive testing program which included seven consecutive successful demands without a failure of the DG.
RIVER 8END - UNIT 1 0 3/4 8-2 Amendment No. 62, 64
l ELECTRICAL POWER SYSTEMS BASES KjpVRCES. D.C. SOURCES and Q!4511E POWER DISTRIBUTION SYSTEMS (Cont The test frequency of Table 4.8.1.1.2-1 is based on the criteria goals of attain 2 90% prior to returning to an overall reliability of > 95% and tThere is a re uireh.ent to return to weekly testing if the The note monthly testing.
nunter of failures is greater than or equal to 2 in 20 or 5 in 100.
to the table (footnote ***") explains that whenever f ailures in excess of one in 20 or f ive in 100 last valid tests an accelerated test frequency must be This weekly (accelerated) test schedule is continued until two first, seven consecutive successful tests maintained.
conditions have been satisfied, have been accumulated, and second, the failures in the most recent 20 tests Seven successful tests indicate a have been reduced to one or less.
Continuing the accelerated testing until reliability of at least 0.90/ demand.
the numt.er of failures is one or less out of 20 adds further assurance that After each the DG reliability has not degraded below the 0.90/ demand level.
f ailure the criteria will be reviewed for reentry into once per weekly testing.
The surveillance requirements for demonstrating the OPERABILITY of the unit batteries are in accordance with the recommendations Nuclear Pnwer Plants", february 197,, and IEEE Std Practice ior Maintenance, Testing, and Replacement of large lead Storage Batteries for Generating Stations and Substations."
Verifying average electrolyte temperature above the minimum for which the battery was sized, total battery terminal voltage on float charge, and connection resistance values, and performing battery service and discharge tests, ensures the effectiveness of the charging system and the 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 an gravity, greater than 2.13 volts and.015 below the manufacturer's nominal gravity.
'abilized full cnarge specific gravity, or a battery charger current that hada The aormal limits for each connected cell for float voltage and specific gravity, greater than 2.13 volts and not more than.020 below them
'ull of all the connected cells not more than.010 below the manuf acturer's charge specific gravity, ensures the OPERABILITY and capability of the battery.
11's parameter outside the normal limit but Operation with a battery
'ied in Table 4.8.2.1-1 is permitted for up to within the allowable value spr (1) the allowable values for electrolyte 7 days. During this 7 day pe, h
level ensures no physical damage to the plates so that they r Amendment No. f:.
B 3/4 8-3 RIVER BENb - UNil 1
_ _ _ -_ _ _ _._... _ _ _ _ _. _... ~.. _. _ _ _ _ _. _ _
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LLECTRICAL POWER SYSI[M
[
BASFS
/L&. 50VRCESm p.C. SOURCLS and ONSITE POW [R DISTRIBUTION SYSTEMS (Continued) gravity of all the cells, not more than.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 siting; (3) the allowable value for an individual cell's specific gravity ensures that an individual a
cell's specific gravity will not be more than.040 below the manufacturer's full charge specific gravity and that the overall capability of the battery will be maintained within an acceptable limit; and (4) the allowable value for an individual cell's float voltage, greater than 2.07 volts, ensures the batt e y's capability to perform its design function.
3/4.8.4 ELEflRICAL E0VIPMENT PROTECTIVE DEVICES Containment electrical penetrations, penetration conductors, main control room lighting, and RPS alternate source of power are protected by either de-energizing circuits not required during reactor operation or demonstrating the OPERABillTY of the overcurrent protection circuit breakers and/or motor starters by periodic surveillance.
The surveillance requirements applicable to lower voltage circuit breakers and/or motor starters provide assurance of breaker and starter reliability by testing at least one representative sample of each i
manufacturer's brand of circuit breaker and/or starter.
Each manufacturer's molded case and metal case circuit breakers and/or more starters are grouped into representative samples which are tested on a rotating basis to ensure that all breakers and/or starters are tested, if a wide variety exists within any manuf acturer's brand of circuit breakers and/or motor starters, it is necessary to divide that manufacturer's breakers and/or starters into groups and treat each group as a separate type of breaker or starter for surveillance purposes.
Specific surveillance tests on the bypass circuits of motor-operated valves' thermal overload protection is not required at River Bend because the circuits are integral with the starting circuits of the motor ope:ated valves and are therefore tested durir.g functional tests of the valves.
For the motor operated valve thermal overloads not bypassed, the thermal cverloads are tested under Specification 4.8.4.1.a.3.
These surveillance requirements are in accordance with RG 1.106, " Thermal Overload Prutection for Electric Motors on Motor Operated Valves," Revision 1, March 1977.
The reactor protection system (RPS) electric power monitoring assemblies provide redundant protection to the RPS, end to other systems that receive power from the RPS buses, by acting to disconnect the RPS'from the power source circuits in the presence of an electrical fault in the power supply.
RIVLR BEND UNIT 1 B 3/4 8-4 Amendment No. 62, 64 l
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