ML20096B671
| ML20096B671 | |
| Person / Time | |
|---|---|
| Site: | North Anna  |
| Issue date: | 04/30/1992 |
| From: | Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML20096B675 | List: |
| References | |
| NUDOCS 9205120230 | |
| Download: ML20096B671 (2) | |
Text
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ELECTRIC AL POWER SYSTEMS 3,'4 8 2 CNSITE POWER DISTRIBUTION SYSTEVS A C DISTRIBUTION - OPER ATING LIMmNG CpblTICW FOR OPERAT10N
' "(
3 8 2.1 The following A.C. electrical busses shall be OPERABLE and energized with a breakers open between redundant busses:
Ah. i a.
H A C. Emergency Busses consisting of:
- 1. 4160 voit Emergency Bus # 2H S
- 2. 480 vatt Emergency Busses # 2H,2H1 b.
J A.C. Emergency Busses consisting of;
- 1. 4130 volt Emergency Bus # 2J
- 2. 480 von Emergsncy Busses # 2J. 2J1 C
120 volt A.C. Vital Bus # 21 energized from its associated inverter conneced to O C Bus # 2 l*
d 120 volt A.C. Vital Bus # 2-11 energzed from its assodated invener connected to D.C. Bus # 211' f
e.
120 volt A.C. Vital Bus # 2111 energized f rom its associated
=vter connected to D C. 3us # 2 lil' t.
Gu voit A C. Vital Bus
- 2 IV energized from its astXiated inverter connected to D C. Bus # 2 IV' ADIUC ABILITY: MODES 1,2. 3. and 4 ACTION:
a.
With one et the requiree A C. Emergency busses not fulty energized. re enerpze within a Wrs or be in at least HOT STANDBY witun the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> and in COLD SHUTDOWN van the following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />.
b.
With one A.C. Vital Bu. not energized. re energize the A.C. Vital Bus within 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> or be in at least HOT STANDBY within the nexi 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> and in COLD SHUTDOWN within the e
foinowing 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />.
f s
c.
With one A.C. Vital Bes either not energized from its assocated inverter, or with the invertor not connected to its assx,iated D.C. Bus, re-energize the A.C. Vital Bus from its associated inverter connected to its associated D.C. Bus wuhin 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 STANDBY wathin tne next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> ard in COLD SHUTDOWN within the tollowing 30
- hours,
'Two inverters may be disconnected from their D.C. Busses for up to 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> as necessary, for the purpose et performing an equalzing charge on their assodated battery banks mvided (1) their v'tal busses are energized, and (2) the remaining vital busses are energized from their associated inveners and connected to their associated D.C. Busses.
Amendment No I37 NORTH ANNA UNIT 2 3'4811 9205120230 920430 POR ADOCK 05000398 P
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