ML19326C249
| ML19326C249 | |
| Person / Time | |
|---|---|
| Site: | Arkansas Nuclear  |
| Issue date: | 03/03/1976 |
| From: | ARKANSAS POWER & LIGHT CO. |
| To: | |
| Shared Package | |
| ML19326C243 | List: |
| References | |
| NUDOCS 8004220820 | |
| Download: ML19326C249 (2) | |
Text
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3.11 DERGENCY COOLING POND Applicability 3h=jh-jfdh Applies to the emergency cooling pond.
Objective To assure the availability of a sufficient supply of cooling water inven-tory in the emergency cooling pond.
Specification 3.11.1 The reactor shall not be taken critical unless the emergency cooling pond is operable with:
1.
An average water depth > 3'0",
and 2.
An average water temperature _> 105F.
3.11.2 With the requirements of Specification 3.11.1 not satisf. ed, be in the hot shutdown condition within 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> and in the cold shutdown condition within the following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />.
Bases The requirements of Specification 3.11.1 provide for sufficient water inventory in the emergency cooling pond to mitigate within acceptable limits the effects of a DBA with a concurrent failure of the Dardanelle Reservoir. The minimum water depth takes into account (1) water loss from evaporation due to heat load and climatological conditions, (2) pond bottom irregularities and (3) suction pipe level at the pond.
The minimum water depth and maximum water temperature correspond to conserva-tive values used to determine pond response and assure the applicability of the calculational model for pond evaporation.
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. 4.13 EMERGENCY COOLING POND Applicability
- Applies to the -emergency cooling pond.
Objective
'li> veri fy the availaisility of a sufficient supply of cooling water inven-tory in the emergency cooling pond.
Specification 4.13.1 The emergency cooling pond shall be determined operable by verifying:
1.
At least once per 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> that the average water depth is > 3'0".
2.
At least once per 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> during the period from June 1 to September 30 that the average water temperature at the point of discharge from the pond is 1150F.
4.13.2 Soundings shall be made annually of the emergency cooling pond bottom to ensure that the required volume of water is available.
Bases The requirements of Spacification 4.13 provide for verification of a sur-ficient water inventory in the emergency cooling pond to handle a DBA with a concurrent failure of the Dardanelle Reservoir.
This specification ensures that Specification 3.11.1 is met, bbnitoring temperature only during the period June 1 to September 30 of each year ensures that, during the hot summer months, the pond temperature limit is not exceeded.
During other periods of the year the pond temperature will not have the potential to reach temperatures near 105F.
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