ML20012D898
| ML20012D898 | |
| Person / Time | |
|---|---|
| Site: | Fort Calhoun  |
| Issue date: | 03/21/1990 |
| From: | OMAHA PUBLIC POWER DISTRICT |
| To: | |
| Shared Package | |
| ML20012D895 | List: |
| References | |
| NUDOCS 9003290069 | |
| Download: ML20012D898 (1) | |
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2.0 LIMITING CONDITIONS FOR OPERATION 2.12 Control Room Systems Aeolicabilit y Applies to the control room air conditioning and filtering systems.
Ob.iective To limit the environmental conditions in the control room, under normal and post DBA conditions.
Specification 1.
If the control room air temperature reaches 105'F, immediate action shall be taken to reduce this temperature and to monitor the temperature within the control cabinets.
If the temperature within the control room or the control cabinets exceeds 120*F and cannot be reduced below 120'F in four hours, the reactor will be placed in hot shutdown within the following six (6) hours.
2.
A thermometer must be in the control room at all times.
3.
All the areas of the plant which have safety related instrumentation will be observed during hot functional testing to determine local temperatures and monitored during operation if normal plant ventilation is not available.
4.
From and after the date that the control room air treatment system is made or found to be inoperable for any reason, reactor operation is permissible only during the succeeding seven days unless such circuit is sooner made operable.
If these conditions cannot be met, the reactor shall be placed in cold shutdown condition within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.
Basis The reactor protective system panels and the engineered safety features panels were designed for, and the instrumentation was tested at, 120'F.
There is a maximum 15'F temperature difference between the inside and outside of the control cabinets. Therefore, if the temperature of the control room exceeds 105'F and if the temperature differential between the inside and outside of the control cabinet cannot be reduced to obtain an inside temperature no greater than 120*F within four hours, the reactor will be shutdown and the conditions corrected to preclude operation of components in an untested environment.
If the control room air treatment system is found to be inoperable, there is no immediate threat to the control room and reactor operation may continue for a limited period of time while repairs are being made, If the system cannot be repaired within seven (7) days, the reactor is shutdown and brought to cold shutdown within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.
2-59 9003290069 900321 PDR ADOCK 05000283 P
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