ML20217M262
| ML20217M262 | |
| Person / Time | |
|---|---|
| Site: | Arkansas Nuclear  |
| Issue date: | 04/30/1998 |
| From: | ENTERGY OPERATIONS, INC. |
| To: | |
| Shared Package | |
| ML20217M260 | List: |
| References | |
| NUDOCS 9805040475 | |
| Download: ML20217M262 (5) | |
Text
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ELECTRICAL POWER SYSTEM i
SURVEILLANCE REQUIREMENTS (Continued) c.
At least once per 18 months during shutdown by:
1.
Subjecting the diesel to an inspection in accordance with procedures prepared in conjunction with its manufacturer's recommendations for this class of standby service.
2.
'/erifying that the automatic sequer.ce time delay relays are OPERABLE at their setpoint i 10% of the elapsed time for each load block.
3.
Verifying the generator capability to reject a load of greater than or equal to its associated single largest post-accident load, and maintain voltage at 4160 i 500 volts and frequency at 60 i 3 Hz.
4.
Verifying the generator capability to reject a load of 2850 Kw without exceeding 75% of the difference between nominal speed and the overspeed trip setroint, or 15% above nominal, whichever is lower.
5.
Simulating a loss of offsite power by,itself, and:
a)
Verifying de-energization of the emergency busses and load shedding from the emergency busses.
b.
Verifying the diesel starts from a standby condition en the undervoltage auto-start signal, energizes the emergency busses with permanently connected loads, energizes the auto-connected shutdown loads through the timo delay relays and operates for 2 5 minutes while its generator is loaded with the shutdown loads.
6.
Verifying that on a Safety Injection Actuation Signal (SIAS) actuation test signal (without loss of offsite power) the diesel generator starts on the auto-start signal l
and operates on standby for 2 5 minutes.
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l 9805040475 900430 PDR ADOCA 05000368 p
PM ARKANSAS - UNIT 2 3/4 8-3 Amendment No. 46,141
3/4.8 1LECTRICAL POWER SYSTEMS-BASES TS 4.8.1.1.2.c.3 demonstrates the EDG load response characteristics and capability to reject the largest single load without exceeding predetermined voltage and frequency while maintaining a specified margin to the overspeed trip.
For ANO-2, the single load for each'EDG is the Service Water pump, l
rated at 800 HP (636.9 kW).
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Containment electrical penetrations and penetration conductors are l
protected by either de-energizing circuits not requi' red during reactor operation or by demonstrating the OPERABILITY of primary and backup j
overcurrent protection circuit breakers during periodic surveillance. The l
480 volt air frame protective devices utilize electro-mechanical overcurrent elements which are mounted on the protective device and, in some instances, protective relays to trip the protective device. Actuation of the overcurrent element or relay will trip the protective device.
The molded case protective devices utilize magnetic or thermal-magnetic overcurrent elements which are contained in the protective device. Actuation of each overcurrent element will trip the protective device.
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ARKANSAS - UNIT 2 B 3/4 8-2 Amendment No. 446
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MARKUP OF CURIE'NT ANO-2 TECHNICAL SPECJFICATIONS l
(FOR INFO ONLY) i l
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ELECTRICAL POWER SYSTEM ll' SURVEILLANCE REQUIREMENTS (Continued)
L At least once per 18 months during shutdown by:
c.
H 1.
Subjecting the diesel to an inspection in accordance with procedures prepared in conjunction with its manufacturer's I
recommendations for this class of sta,ndby service.
1 2.
Verifying that the automatic sequence time delay relays are j
OPERABLE at their setpoint i 10% of the elapsed time for each load block.
3.
Verifying the generator capability to reject a load of &&G6 l
kwgleater than or equal to its.., associated y ngl _e largest post-aScident load and maintain voltage at 4160 t 500 volts and t
l frequency at 60 1 3 Hz.
i 4.
Verifying the generator capability to reject a load of 2850 i
Kw without exceeding 75% of the difference between nominal l
speed and the overspeed trip setpoint, or 15% above nominal, whichever is lower.
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5.
Simulating a loss of offsite power by itself, and:
a)
Verifying de-energization of the emergency busses and load shedding from the emergency busses.
b.
Verifying the diesel starts from a standby condition on the undervoltage auto-start signal, energizes the l
emergency busses with permanently connected loads, energizes the auto-connected shutdown loads through the time delay relays and operates for 2 5 minutes while its generator is loaded with the shutdown loads.
1 6.
Verifying that on a Safety Injection Actuation Signal (SIAS) actuation test signal (without loss of offsite power) the diesel generator starts on the auto-start signal and operates on standby for 2 5 minutes.
ARKANSAS - UNIT 2 3/4 8-3 Amendment No. 46,441
4 3/4.8 ELECTRICAL POWER SYSTEMS BASES TS 4.8.1.1.2.c.3 demonstrates the EDG load response characteristics and EaBah!AllL.1111?At the layggsLsj,qg} M gad without exceeding _ predetermined 1913A9L2AdmD251MDSLIL1J3Jgaintainina a s,oecified maroin to the_3gerspe.ed h
EE$26fl.E2Mdu the sing}gJgd fgr each EDG is the Service WaQQuqtpg m
LaAed 33,810_,,gPJ)L9Jg12 Containment electrical penetrations and penetration conductors are protected by either de-energizing circuits not required during reactor operation or by demonstrating the OPERABILITY of primary and backup overcurrent protection circuit breakers during periodic surveillance.
The 480 volt air frame protective devices utilize electro-mechanical overcurrent elements which are mounted on the protective device and, in some instances, protective relays to trip the protective device. Actuation of the overcurrent 1
element or relay will trip the protective device. The molded case protective devices' utilize magnetic or thermal-ma(,uetic overcurrent elements which are contained in the protective device. Actuation of ea,ch overcurrent element will trip the protective device.
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l ARKANSAS - UNIT 2 B 3/4 8-2 Amendment No. 146