ML20002A717

Marked-up Proposed Tech Specs & Safety Evaluation for Changes to Tech Specs 4.8.1.1.2.c.7 & 4.8.1.2 Re Relief from Diesel Generator Operability Requirements

ML20002A717
Person / Time
Site:	Farley
Issue date:	11/18/1980
From:	ALABAMA POWER CO.
To:
Shared Package
ML20002A715	List: ML20002A714 ML20002A717
References
NUDOCS 8011210370
Download: ML20002A717 (3)

Text

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ELECTRICAL PCWER SYSTEMS q . .r SURVEILLANCE REQUIREMENTS (Continued)

6. Simulating a loss of offsite power in conjunction with a Safety Injection test signal, and a) Verifying de-energization of the emergency busses and load shedding from the emergency busses.

b) Verifying the diesel starts from ambient condition on the auto-start signal, energizes the emergency busses with permanently connected loads within 10 seconds, energizes the auto-connected emergency (accident) loads through the load sequencer and operates for greater than or equal to 5 minutes while its generator is loaded with the. emergency loads. After energization, the steady state voltage and frequency of the emergency busses shall be maintained at 4160 1 420 volts and 60 1.1.2 Hz during this test.

c) Verifying that all automatic diesel generator trips, except engine overspeed and generator differential and low lube oil pressure, are automatically bypassed upon loss of voltage on the emergency bus and/or a safety injection test signal.

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

During the first 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> of this test, the diesel generator shall be loaded to greater than or equal to 4474 kw for the 4075 kw diesels and 3250 for the 2850 diesels and during the remaining 22 hours2.546296e-4 days <br />0.00611 hours <br />3.637566e-5 weeks <br />8.371e-6 months <br /> of this test, the diesel generator shall be loaded to greater than or equal to 4075 kw for the 4075 kw diesels and 2850 kw for the 2850 kw diesels. Immediately after completing this 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> test, perform Specification 4.8.1.1.2.c.4. The

_ generator voltage and frequency shall be 1 3952 volts and 2 57 Hz within 10 seconds after the start signal; the generator voltage and frequency shall be maintained between 3120 and 4190 volts and 57 and 61.2 Hz during this g test.1 s

8. Verifying that the auto-connected loads to each diesel generator do not exceed the-2000 hour rating of 4353 kw for the 4075 kw

. generator and 3100 kw for the 2850 Lw generator.

9. 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 of fsite power, b) Transfer its loads to the offsite power source, and

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Be restored to.its standby status.

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SHUTDOWN LIMITING CONDITION FOR OPERATION 3.8.1.2 As a minimum, the following A.C. electrical power sources shall be OPERABLE:

a. One circuit betwaen the offsite transmission network to the switchyard and from the switchyard to the onsite Class lE distribution system, and

b. One 4075 kw diesel generator and one 2850 kw diesel generator each with:

1. A day tank containing a minimum volume of 900 gallons for the 4075 kw generator and 700 gallons for the 2850 kw diesel generator,

2. A fuel storage tank containing a minimum volume of 25,000 gallons of fuel, and

3. A fuel transfer pump.

1 APDLICABILITY: MODES 5 and 6.

ACTION:

With less then the above minimum required A.C. electrical power sources OPERABLC, suspend all operations involving CORE ALTERATIONS or positive reactivity changes.

SURVEILLANCE REQUIREMENTS 4.8.1.2 The above required A.C. electrical power sources shall be demonstrated OPERABLE gy the performance of each of the Surveillance Requirements of 4.8.1.1.1,

4. 8.1.1. 2 (except f or requi rement 4. 8.1.1. 2. a. 5) and 4. 8.1.1. 3. [

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o SAFETY EVALUATION FOR CHANCES TO TECHNIC / SPECIFICATIONS 4.8.1.1.2.c.7 & 4.8.

1.2 BACKGROUND

Technical . Specifications 4.8.1.1.2.c.7 and 4.8.1.2 require that a 24-hour load test be performed followed immediately by a loss of of f Ne power test. Pre-operational tests, which are used as a basis for demonstrating initial compliance with surveillance requirements, did include a 24-hour load test (see note) and a loss of-offsite power test, both of which were successful. However, the loss of offsite power test was not performed immediately following the 24-hour load test, as required by 4.8.1.1.2.c.7 and 4.8.1.2, because at the time of the tests, the Technical Specifications had not been approved and there was no commitment to Regulatory Guide 1.108, Revision 1, August 1977.

In order to meet the requirements of 4.8.1.2 and 4.8.1.1.2.c.7, a retest would have to be performed before initial fuel load and before entry into MODE 4, respectively. This is impractical because a hot functional plant configura-tion would be required for performance of this test.

In lieu of performance of surveillance testing to meet specification 4.8.1.2 prior to entry into MODE 6 and specification 4.8.1.1.2.c.7 prior to entry into MODE 4, testing will be performed prior to entry into MODE 2.

This is a one time change applicable to plant operation prior to initial t criticality.

REFERENCES Technical Specifications 4.8.1.1.2.c.7 and 4.8.1.2.

BASES All surveillance tests associated with the diesel generators required for MODE 6 will have been performed before fuel loading except the immediate perfor-mance of the loss of of fsite power test following a 24-hour load test. Both the loss of offsite power test and a 24-hour load test have been successfully per-formed. Therefore, a high degree of confidence can be placed in diesel generators to assure their reliability and operability until the requirements of specifica-tions 4.8.1.1.2.c.7 and 4.8.1.2 are fully performed prior to initial criticality.

CONCLUSION The proposed change to Technical cecifications 4.8.1.1.2.c.7 and 4.8.1.2 does not involve an unreviewed safety question as defined by 10CFR50.59.

NOTE: Diesel generator load test completed per the following loading:

1500 KW - 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> 4075 KW - 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> 3000 KW - 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> 4474 kW - 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br />

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