ML20217A390
| ML20217A390 | |
| Person / Time | |
|---|---|
| Site: | Comanche Peak  |
| Issue date: | 03/18/1998 |
| From: | TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC) |
| To: | |
| Shared Package | |
| ML20217A387 | List: |
| References | |
| NUDOCS 9803250027 | |
| Download: ML20217A390 (2) | |
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1.
ATTACHMENT 3 to TXX 98079 AFFECTED TECHNICAL SPECIFICATION PAGES (TS 4.8.1.1.2f.4)a) and 4.8.1.1.2f.6)a))
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' Attachment 3 to TXX-98079 Page 1 of 1 ELECTRICAL POWER SYSTEMS SURVEILLANCE REQUIREMENTS (Continued) 4)
Simulating a loss-of offsite power by itself, and:
a)
Verifying deenergization of the emergency busses and load shedding ***, froin the emergency busses, and
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b)
Verifying the diesel starts on the auto start signal, energizes the emergency busses with permanently connected loads within 10 seconds, energizes the auto-connected shut-down loads through the load saquencer 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 busses shall be maintained at 6900 1 690 volts and 60 1 1.2 Hz during this test.
5)
Verifying that on a Safety Injection Actuation test signal, without loss-of-offsite power, the diesel generator starts on the auto-start signal and operates on standby for greater than or equal to 5 minutes.
The generator voltage and frequency shall be 6900 1 690 volts and 60 1 1.2 Hz within 10 seconds after the auto-start signal: the steady state generator voltage and frequency shall be maintained within these limits during this test:
6)
Simulating a loss of-offsite power in conjunction with a Safety Injection Actuation test signal, and:
a)
Verifying deenergization of the emergency busses and load I
shedding **_* from the emergency busses:
l b)
Verifying the diesel starts 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 6900 1 690 volts and 60 1 1.2 Hz during this test: and c)
Verifying that all automatic diesel generator trips, except i
engine overspeed and generator differential, are automatically bypassed upon loss of voltage on the emergency bus concurrent with a Safety Injection Actuation signal.
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 ynmmn n
- On.a,one time basisuthe; verification (that load. shedding, occurs as=a result:ofi x
the'deenergitationtof the? emergency; busses'.mayibe performed at;poweriforffuel:
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cycl ei63n; Uni ty and ifuel; cycl e 1on; Uni t12 ;
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