Text

Amend 59 to License NPF-62,revising TS 4.8.1.1.2 Conditions for Test Starting of Diesel Generators Consistent W/ Recommendation in Generic Ltr 84-15
	ML20083F203
Person / Time
Site:	Clinton
Issue date:	09/24/1991
From:	Gody A; Office of Nuclear Reactor Regulation
To:	;
Shared Package
ML20083F204	List: ML20083F203; ML20083F209; ML20083F217;
References
	GL-84-15, NUDOCS 9110040131
	Download: ML20083F203 (12)
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'o UNITED STATES

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NUCLEAR REGULATORY COMMISSION 5

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ILLIN0IS POWER COMPANY, ET AL.

DOCKET NO. 50-461 CLINTON POWER STATION, UNIT NO. 1 AMENDMENT TO FACILITY OPERATING LICENSE Amendment No. 59 License No. NPF-62 1.

M6 Nuclear Regulatory Comission (the Comission) has found that:

The application for ar,endrsent by(the licensees) dated October 30,111 A.

Joyland rower Coooerative, Inc.

1987 end revised June 30, 1989, complies with the standards and re<uirements of the Atomic Energy Act of 1954, as amended (the Act),

anc the Comission's rules and regulations set forth in 10 CFR Chapter 1; B.

Tne facility will operate in conformity with the application, the provisions of the Act, and the rules and regulations of the Com.ission; C.

'ihereisreasnnableassurance(i)thattheactivitiesauthorizedby 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 Comission's regulations; D.

The issuance of this amendment will not be inimical to the comon defense and security or to the health and safety of the public; and E.

The issuance of this amendment is in accordance with 10 CFR Part 51 1

of the Commission's regulations and all applicable requirements have been satisfied.

-2.

Accordingly, the license is amended by changes to the Technical Specifi-cations.as indicated in the attachment to this license amenda.ent, and paragraph 2.C.(2) of Facility Operating License No. NPF-62 is hereby amended to read as follows:

T}llinois Power Company is authorized to act as agent for Soyland Power

. Cooperative, Inc. and has exclusive responsibility and control over the physicci construction, operation and maintenance of the facility.

9110040131 910924 PDR ADDCK 05000461 P

PDR

,a-

2 (2) Technical Specifications and Environmental Protection P1sn The Technical Specifications contained in Appendix A and the Environmental Protection Plan contained in Appendix B, as revised through Amendment No. 59

, are hereby incorporated into this license.

Illinois Power Company shall operate the facility in accordance with the Technical Specifications and the Environmental Protection Plan.

3.

This license amendment is effective as of its date of issuance.

FOR THE NUCt. EAR REGULATORY COMMISSION

$$ Wf f

Anthony Tf Gody, Jr., Project Manager Project Directorate 111 3 Division of Reactor Projects Ill/lV/V Office of Nuclear Reactor Regulation

Attachment:

Changes to the lechnical Specifications Date of issuance:

September 24, 1991

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ATTACHMENT TO LICENSE AMEt4DMLitT NO. 59 FACILITY OPERATING LICENSE NO. NPF-62 DOCKET NO. 50-461 Feplace the following oages of the Appendix 'A' *iechnical Specifications with the attached pages. T1e revised pages are identified by smcadment number and contain vertical lines indicating the area of change. The corresponding overleaf pages are provided to maintain document completeness.

Remove Insert 64 M4 3/4 8-5 3/4 8-5 3/4 8-6 3/4 8-6 3/4 8-7 3/4 8-7 B 3/4 8-1 B 3/4 8-1 B 3/4 E-2 B 3/4 B-2 B 3/4 8-3 B 3/4 8-3 i

p ELECTRICAL POWER SYSTEMS l

AC SOURCES - OPERATING LIMITING CONDITION FOR OPERATION (Contin _u,ed) 3.8.1.1 ACTION (Continued):

of the above-required offsite circuits to OPr;ABLE status within 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months or be in at least HOT SHUTDOWN within the.. ext 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months . With only one offsite circuit restored to OPERABLE status, restore at least two offsite circuits to OPERABLE status within 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months frem time of initial loss or be in at least HOT SHUTDOWN within the next 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months and in COLD SHUTDOWN within the following 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months .

A successful test (s) of dfesel generator OPERABILITY per Surveillance Requirements 4.8.1.1.2.a.4 and 4.8.1.1.2.a.5, performed under this ACTION statement for the OP(RABLE diesel Generators, satisfies the diesel generator test requirements of ACTION statement,a.

g.

With diesel generators 1A and 13 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 bour and at least once per 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months thereafter and Surveillance Require-ments 4.8.1.1.2.a.4 and 4.8.1.1.2.a.5 for diesel generator IC within 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months .* Restore at least one of the inoperable diesel generators 1A and IB to OPERABLE status within 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months or be in at least HOT SHUTDOWN within the next 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months and in COLD SHUTDOWN within the following 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months .

Restore both diesel generators 1A and IB to OPERABLE ttatus within 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months from time of initial loss or be in at least HOT SHU1DOWN within the next 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months and in COLD SHUTOOWN within the following 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months .

h.

With one offsite circuit of the above reauired AC electrical power sources inoperable and diesel generator 10 inoperable, apply the requirements of ACTION statements a and d specified above.

1.

With either diesel generator IA or 19 inoperable and diesel generator 1C inoperable, apply the requirements of ACTION statements b, d and e specified above.

This test is required to be ceepleted regardless of when the inoperable diesel generator is restored to OPERABILITY.

The provisior.s c' Specification 3.0.2 are not applicable.

CLINTON - UNIT 1 3/4 8-3 t

ELECTRICAL POWER SYSTEMS AC SOURCES - OPERATING SURVEILLANCE REQUIREMEN1s 4.8.1.1.1 Each of the above required independent circuits between the offsite transmission network and the onsite Class 1E distribution system shall be:

a.

Determined OPERABLE at least once per 7 days by verifying correct breaker alignments and indicated power availability, and b.

Demonstrated OPERABLE at least once per 18 months during shutdown by trans-ferring, manually and automatically, unit power supply from the normal circuit to the alternate circuit.

4.8.1.1.2 Each of the above required diesel generators shall be demonstrated OPERABLE:*

I a.

In accordance with the frequency specified in Table 4.8.1.1.2-1 on a STAG-GERED TEST BASIS by:

1.

Verifying the fuel level in the day fuel tank.

2.

Verifying the fuel level in the fuel storage tank.

3.

Verifying the fuel transfer pump starts and transfers fuel from the storage system to the day fuel tank.

4.

Verifying the diesel starts from ambient condition and accelerates to at least 900 1 18 rpm in less than or equal to 12 seconds.** The I

generator voltage and frequency shall be 4160 1 420 volts and 60 1 1.2 Hz within 12 seconds ** after the start signal.

The diesel generator l

shall be started for this test by using one of the following signals:

a) Hanual.

b) Simulated loss of offsite power by itself.

c) Simulated loss of offsite power in conjunction with an ESF actua-tion test signal.

d) An ECCS actuation test signal by itself.

I All planned diesel generator starts performed for the purpose of meeting these surveillance requirements may be preceded by an engine prelube period as recommended by the manufacturer.

- Surveillance testing to verify the diesel generator start and load times' (less than or equal to 12 seconds and less than or equal to 90 seconds respectively) from ambient conditions shall be performed at least once per 184 days.

All other engine starts performed for the purpose of meeting these surveillance requirements may be conducted in accordance with warmup and loading procedures as recommended by the manufacturer.

This is in order to minimize mechanical stress and wear on the diesel generator caused by fast starting and loading of the diesel generator.

CLINTON - UNIT 1 3/4 8-4 Amendment No. 59 i

l i

ELECTRICAL POWER SYSTEMS AC SOURCES - OPERATING 1

SURVEILLANCE REQUIREMENTS (Continued) 4.8.1.1.2 (Continued) 5.

Verifying the diesel generator is synchronized, loaded in greater l

than or equal to 3869 kW for diesel generator 1A, 3875 kW for diesel generator 1B and 2200 kW for diesel generator IC in less than or equal to 90** seconds, and operates with this load for at least 60 minutes.

l 6.

Verifying the diesel generator is aligned to provide standby power to the associated emergency buses.

7.

Verifying the pressure in all diesel generator air start receivers to be greater than or equal to 200 psig.

b.

At least once per 31 days and af ter each operation of the diesel where the period of operation was greater than or equal to I he by checking for and removing accumulated water from the day fuel tanka.

c.

At least once per 92 days by removing accumulated water from the fuel storage tanks, d.

At least once per 92 days and from new fuel oil prior to addition to the storage tanks by ootaining a sample in accordance with ASTM-D270-1975, andbyverifylngthatthesamplemeetsthefollowingminimumrequirements and is tested within the specified time limits:

1.

As soon as sample is taken from new fuel or prior to addition to the storage tank, as applicable, verify in accordance with the tests specified in ASIM-0975-77 that the sample has:

a)

A water and sediment content of less than or equal to 0.05 volume percent.

b)

A kinematic viscosity at 40'C of greater than or equal to 1.9 centistokes, but less than or equal to 4.1 centistokes.

c)

An API gravity 0 60'F of greater than or equal to 30 degrees but less than or equal to 40 degrees.

2.

Within one week after obtaining the sample, verify an impurity level of less than 2 mg of insolubles per 100 ml when tested in accordance with ASTH-D2274-70.

- Surveillance testing to verify the diesel generator start and load times (less than or equal to 12 seconds and less than or equal to 90 seconds respectively) from ambient conditions shall be performed at least once per 184 days.

All other engine starts performed for the purpose of meeting these surveillance requirements may be conducted in accordance with warmup and loading procedures as recommended by the manufacturer.

This is in order to minimize mechanical stress and wear on the diesel generator caused by fast starting and loading of the diesel generator.

l CLINTON - UNIT 1 3/4 8-5 Amendment No. 59 l-

ELECTRICAL POWER SYSTEMS AC SOURCES - OPERATING SURVEILLANCE REQUIREMENTS (Continued) 4.8.1.1.2 (Continued) 3.

Within two weeks after obtaining the sample, verify that the other l

properties specified in Table 1 of ASTM-D975-77 and Regulatory Guide 1.137, Position 2.a, are met when tested in accordance with ASTM-0975-77.

e.

At least once per 18 months,# during shutdown, by:

1.

Subjectino the diesel to an inspection in accordance with procedures preparedinconjunctionwithitsmanufacturer'srecommendationsfor this class of standby service.

2.

Verifying the diesel generator capability to reject a load of greater than or equal to 1120 kW for diesel generators 1A and IB, and greater than or equal to 1995 kW for diesel generator 1C while maintaining engine speed < nominal plus 75% of the difference between nominal speed and the overspeed trip setpoint or 15% above nominal whichever is less.

3.

Verifying the diesel generator capability to reject a load of 3869 kW*

for diesel generators IA, 3875 kW* for diesel generatoc IB and 2200 kW*

for diesel generator 1C without tripping.

The generator voltage shall not exceed 5000 volts for diesel generator 1A and IB and 5824 volts fordieselgeneratorICduringandfollowingtheloadrejection.

4.

Simulating a loss of offsite power by itself, and:

a)

For Divisions I and II:

1)

Verifying deenergization of the emergency buses and load shedding from the emergency buses.

2)

Verifying the diesel generator starts on the auto-start signal, energizes the emergency buses with permanently con-netted loads within 12 seconds, energizes the auto-connected loads required for sqfe shutdown through the load sequence (individual timers), and operates for greater than or equal to 5 minutes while its generator is loaded with the shutdown loads.

After energization, the steady state voltage and frequency of the emergency buses shall be main-tained at 4160 1 420 volts and 60 1 1.2 Hz during this test.

l

For any start of a diesel, the diesel must be operated with a load in accord-ance with the manufacturer's recommendations.

Momentary transients due to changing bus loads shall not invalidate the test.

CLINTON - UNIT 1 3/4 8-6 Amendment No. 59

4 ELECTRICAL POWER SYSTEMS AC SOURCES - OPERATING SURVEILLANCE REQUIREMENTS (Continued) 4.8.1.1.2 (Continued) b)

For Division III:

1)

Verifying deenergization of the emergency bus.

2)

Verifying the diesel generator starts on the auto-start signal, energizes the emergency bus with the permanently connected loads within 12 seconds and operates for greater thanorequalto5minuteswhileItsgeneratorisloadedwith the shutdown loads.

After energization, the steady state voltage and frequency c, the emergency bus shall br; main-tained at 4160 1 420 volts and 60 1 1.2 Hz during this test.

5.

Verifying that on an ECCS actuation test signal, without loss of off--

site power, the diesel generator starts on the auto-start signal and operates on standby for greater than or equal to 5 minutes.

The 0ener-ator voltage and frequency shall be 4160 1 420 volts and 60 1 1.2 Hz within 12 seconds after the auto-start signal; the steady state ganerator voltage and fregeency shall be maintained within these limits during this test.

6.

Simulating a loss of offsite power in conjunction with an ECCS actuation test signal, and:

a)

For Divisions I and 11:

1)

Varifying deenergization of the emergency buses and load shedding from the emergency buses.

2)

Verifying the diesel generator starts'on the auto-start signal, energizes the emergency buses with permanently connected loads within 12 seconds, energizes the auto-connected loads required for safe shutdown through the load sequence (individual timers) and operates for greater than orequalto5minuteswhileItsgeneratorisloadedwiththe emergency loads.

After energization, the steady state volt-age and frequency of the emergency buses shall be main-tained at 4160 1 420 volts and 60 1 1.2 Hz during this test.

b)

For Division III:

1)

Verifying deenergization of the emergency bus.

2)

Verifying the diesel generator starts on the auto-start signal, energizes the emergency bus with its loads and the auto-connected emergency loads within 12 seconds and oper-ates for greater than or equal to 5 minutes while its generator is loaded with the emergency loads.

After ener-gization, the steady state voltage and frequency of the CLINTON - UNIT 1 3/4 8-7 Amendment No.59

M%

ELECTRICAL POWER SYSTEMS AC SOURCES - OPERATING SURVEILLANCE REQUIREMENTS (Continued) 4.8.1.1.2 (Continued) emergency bus shall be maintained at 4160 1 420 volts and 60 1 1.2 Hz during this test.

7.

Verifying that all automatic diesel generator trips are automatically bypassed upon an ECCS actuation signal exceot for Divisions I, II and III, engine overspeed and generator differential current.

8.

Verifying the diesel generator operates for at least 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months .

During the first 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months of this test, the diesel generator shall be loaded to greater than or equal to 4256 kW** for diesel generator 1A, 4263 kW**

for diesel generator 18 and 2420 kW** for diesel generator IC.

During the remaining 22 hours2.546296e-4 days 0.00611 hours 3.637566e-5 weeks 8.371e-6 months of this test, the diesel generator shall be loaded to 3869 kW** for diesel generator lA, 3875 kW** for diesel gen-erator IB and 2200 kW** for diesel generator IC.

The generator voltage and frequency shall be 4160 1 420 volts and 60 1 1.2 Hz within 12 sec-onds after the start signal; the steady state generator voltage and

-frequency shall be maintained at 4160 1 420 volts and 60 1 1.2 Hz during this test.

Within 5 minutes after completing this 24-hour test, perform Survel11ance Requirement 4.8.1.1.2.e.4.a)2) and b)2)*.

9.

Verifying that the auto-connected loads to each diesel generator do not exceed the 2000-hour rating of 4078 kW for diesel generator IA, 4082 kW for diesel generator 18 and 2350 kW for diesel generator IC.

10.

Verifying the diesel generator's capability to:

a)

Synchronize with the offsite power source while the generator is loaded with its emergency loads upon a simulated restoration of offsite power, b)

Transfer its loads to the of fsite power source, and c) 8e restored to its standby status.

11. Verifying that, with the diesel generator operating in a test mode and connected to its bus, a simulated ECCS actuation signal overrides the test mode and returns the diesel generator to standby operation, and automatically energizes the emergency loads with offsite power.

12.

Verifying that the fuel. transfer pump transfers fuel from the fuel storage tank to the day tank of each diesel.

If Surveillance Requirements 4.8.1.1.2.e.4.a)2) and b)2) are not satisfactorily completed, it is not necessary to repeat the preceding 24-hour test.

Insteed, the diesel generator may be operated at continuous rating for I hour or until operating temperatures have stabilized prior to performing Surveillance Requirements 4.8.1.1.2.e.4.a)2) and 4.8.1.1.2.e.4.b)2).

- Momentary transients due to changing bus loads shall not invalidate the test.

CLINTON - UNIT 1 3/4 8-8

3/4.8 ELECTRICAL POWER SYSTEMS BASES 3/4.8.1, 3/4.8.2 AND 3/4.8.3 AC SOURCES, DC SOURCES, AND ONSITE POWER u

DISTRIBUTION SYSTDt5 The OPERABILITY of the AC and DC 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 AC and DC power sources and distribution systems satisfy th 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 sourceu 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 Division I or II of the onsite AC and DC power sources and associated distribution systems OPERABLE during accident conditions coinci-dent with an assumed loss of offsite power and single failure of the other onsite AC source.

Division III supplies the high pressure core spray (HPCS) system only.

The AC and DC source allowable out-of-service times are based on Regulatory Guide 1.93, " Availability of Electrical Power Sources," December 1974.

When diesel generator IA or 18 is inoperable, there is an additional ACTION require-ment to verify that all required systems, subsystems, trains, components and devices, that depend on the remaining OPERABLE diesel generator IA or IB 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 com-plete loss of safety function of critical systems during the period diesel generator 1A or IB is 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 ntst mean to perform the surveillance requirements needed to demonstrate the OPERABILITY of the component.

Analysis has shown that testing which includes a semi-annual fast start of the diesel generators is sufficient to demonstrate the capability of the onsite A.C. power systems to mitigate the consequences of the design basis event for the plant (i.e., large LOCA coincident with a loss-of-offsite power) vhile minimiring the ma:hanical stress 6nd wear on the diesel generator.

The OPERABILITY of the miaimum s p cified AC and DC power tources and asso-ciated distribution systeh.s during shutdown and refueling ensureb that (1) the facility can be maintr.ined in the shutdcwn or refueling condition for extended time periods and (2) sufficient irstramtntation and contro) capability is avail-able for monitoring and maintaining the unit status.

i The surveillance requirements for demonstrating the OPERABILITY of the diesel l

generators are in accordance with the recommendations of Regulatory Guide 1.9, I

l CLINTON - UNIT 1 8 3/4 8-1 Amendment No.59 l

ELECTRICAL. POWER SYSTEMS BASES 3/4.8.1, 3/4.8.2, and 3/4.8.3 AC SOURCES, DC SOURCES, AND ONSITE POWER DT3TRIBUTION 5YSTEMS (Continted)

" Selection of Diesel Generator Set Capacity for Staldby Power Supplies",

March 10, 1971, Regulatory Guide 1.108, ~ Periodic Testing of Diesel Generator Units Used as Dnsite Electric Power Systems at Nuclear Power Plants," Revision 1, t,ugust 1977 and Regulatory Guide 1.137 " Fuel-Oil Systems for Standby Ditsel Generators," Revision 1, October 1979.

The surveillar.ce requirements for demonstrating the OPERABILITY of the unit batteries are in accordance with the recommendations of Regulatory Gelde 1.129

" Maintenance Testing and Replacement of Large Lead Storage Batteries for Nuclear Power Plants," February 1978, Regulatory Guide 1.32, " Criteria for Safety-Relateo Electric Power Systems for Nuclear Power Plants," February 1977, IEEE Std 450-1975, "IEEE Recommended Practice for Maintenance, Testing, and Replace-ment of Large Lead Storage Batteries for Generating Stations and Substations,"

and IEEE Std 308-1974, "IEEE S'.anda,a Criteria for Class IE Power Systems for Nuclear Power Generating Stations" with exceptions noted in the CPS-FSAR.

Verifyhg average electrolyte temperature above the minimum for which the battery was sized, total battery terminal voltage on float 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 t 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.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 for each connected cell for float voltage and specific gran ty, greater than 2.13 volts and riut more than.020 below the manufacturer's full charge specific gravity with an average specific gravity of all the connected cells not more than.010 below the manufacturer's full charge specific gravity, ensures the OPERABILITY and capability of tha battery.

Operation with a battery cell's parameter outside the normal limit but within the allowab'.e value specified in Table 4.8.2.1-1 is permitted for up to 7 days.

Puring this 7 day period:

(3) the allowable values for electrolyte level ensures no physical damage to the plates with an adequate electron transfer capability; (2)theallowablevaluefortheaveragespecificgravityofallthecells,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 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.040 below the manufacturer's full charge specific gravity and that the overall-capability of the battery will be maintaired within an 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.

i CLINTON - UNIT 1 B 3/4 8-2

us_es--

l ELECTRICAL POWER SYSTEMS BASES 3/4.8.4 ELECTRICAL EQUIPMENT PROTECTIVE DEVICES Containment electrical penetrations and penetration conductors are protected I

by demonstrating the OPERABILITY of primary and backup overcurrent protection circuit breakers by periodic surveillance.

The surveillui.s requirements applicable to lower voltage circuit breakers provides assurance of breaker reliability by testing at least one representative sample of each manufacturer's brand of circuit breaker.

Each manufacturer's molded case and metal case circuit breakers are grouped into representative samples which are then te;ttd on a rotating basis to ensure that all breakers are tested.

If a wide variety exists within any manufacturer's brand of circuit breakers, it is necessary to divide that manufacturer's breakers into groups and treat each graup as a separate type of breaker for surveillance purposes.

The bypassing of the motor-operated "alves thermal overload protection contin-uously ensures that the thermal overload protection will not prevent safety-related valves from performing their function.

The Surveillance Requirements for demonstrating the bypassing of the thermal overload protection continuously are in accordance with Regulatory Guide 1.106 " Thermal Overload Protection for Electric. Motors on Metr-' Operated Valves," Revision 1, March 1977.

The reactor protection system (RPS) electric power monitoring assemblies provide protection to the RPS and other systems which receive power from the RPS teuses by acting to disconnect the RPS from the power source in the presence of an electrical fault in the power supply.

CLINTON - UNIl 1 B 3/4 8-3

ML20083F203

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