ML16293A741
| ML16293A741 | |
| Person / Time | |
|---|---|
| Site: | Oconee  |
| Issue date: | 02/04/1988 |
| From: | Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML16293A742 | List: |
| References | |
| NUDOCS 8802110069 | |
| Download: ML16293A741 (1) | |
Text
The circuits or channels of more than one functional unit of the EPSL may be inoperable only if:
- 1. The inoperability results from a loss of power due to the in operability of a 125 VDC instrumentation and control panelboard (see 3.7.2(e) below); and
- 2. The conditions of Table 3.7-1 for degraded operation are satisifed for the affected functional units.
If any event, if the reactor is subcritical, the inoperable circuit(s) or channel(s) shall be restored to operability and the conditions of Table 3.7-1 for normal operation shall be satisifed for all functional units before the reactor is returned to criticality.
(c) One 4160 volt main feeder bus may be inoperable for 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.
(d) One complete single string (i.e., 4160 volt switchgear (TC, TD, or TE),
600 volt load center, (X8, X9, or X10), 600-208 volt MCC(XS1, XS2, or XS3),
and their loads) of each unit's 4160 volt Engineered Safety Features Power System may be inoperable for 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.
(e) One or more of the following DC distribution components may be in operable for periods not exceeding 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> (except as noted in 3.7.2(g) below):
- 1. One complete single string or single component (i.e., 125VDC battery, charger, distribution center, and panelboards) of the 125VDC 230KV Switching Station Power System.
- 2. One complete single string or single component (i.e., 125VDC battery, charger, and distribution center) of the Keowee 125VDC Power System may be inoperable provided the remaining string of Keowee is operable and electrically connected to an operable Keowee hydro unit.
- 3. One complete single string or single component (i.e., 125VDC battery, charger, distribution center, and associated isolating and transfer diodes) of any units 125VDC Instrumentation and Control Power System. Only one battery more than the number allowed to be inoperable per 3.7.1 (f) for the Station may be removed from service under this paragraph.
- 4. One 125 VDC instrumentation and control panelboard and its associated loads, per unit, provided that no additional AC buses are made inoperable beyond the provisions of 3.7.2(a), (c), and (d), and provided that the conditions of Table 3.7-1 for normal operation are satisfied for all functional units of the EPSL before the 125 VDC instrumentation and control panelboard becomes inoperable. Additionally, the provisions of 3.7.2.(h) must be observed for the 120 VAC vital instrumentation power panelboard which is powered by the affected 125 VDC panelboard.
- A one-time extension of inoperability for a period of 10 days per battery is granted to allow for installation of new Keowee battertes and battery racks.
8802110069 880204,
Amendment No.
165 (Unit 1)
PDR ADOCK 05000269 3.7-3 Amendment No.
165 (Unit 2)
P PDR m
- ~--
J--Anendmeflt No. 162 (Unit 3)