ML14175A874
| ML14175A874 | |
| Person / Time | |
|---|---|
| Site: | Robinson  |
| Issue date: | 05/29/1985 |
| From: | NRC |
| To: | |
| Shared Package | |
| ML14175A875 | List: |
| References | |
| NUDOCS 8506060532 | |
| Download: ML14175A874 (2) | |
Text
ATTACHMENT TO LICENSE AMENDMENT AMENDMENT NO. 90 FACILITY OPERATING LICENSE NO. DPR-23 DOCKET NO. 50-261 Revise Appendix A as follows:
Remove Page Insert Page 4.6-2 4.6-2 4.6-3 4.6-3 6506060532 850529 PDR ADOCK 050o0261 P
(HBR-14) 4.6.3.5 The batteries shall be subjected to a load test once every five years. The battery voltage as a function of time shall be monitored to establish that the battery performs as expected during heavy discharge and that all electrical connections are tight.
4.6.4 Pressurizer Heaters' Emergency Power Supply The emergency power supply for the pressurizer heaters shall be demonstrated operable each refueling shutdown by transferring power from normal to the emergency power supply and energizing the heaters.
Basis The tests specified are designed to demonstrate that the diesel generators will provide power for operation of equipment. They also assure that the emergency generator system controls and the control systems for the safety features equipment will function automatically in the event of a loss of all normal 480 V AC station service power.(1)
The test to ensure proper operation of engineered safety features upon loss of AC power is initiated by tripping the breakers supplying normal power to the 480 volt buses and initiating a safety injection signal. This test demonstrates the proper tripping of motor feeder breakers, main supply and tie breakers on the affected bus, operation of the diesel generators, and sequential starting of essential equipment.
The test of the diesel protective bypass circuits is performed to verify their operability.
The testing frequency specified will be often enough to identify and correct any mechanical ortelectrical deficiency before it can result in a system failure. The fuel supply and starting circuits and controls are continuously 4.6-3 Amendment -No. 90