ML19331C613
| ML19331C613 | |
| Person / Time | |
|---|---|
| Site: | Big Rock Point File:Consumers Energy icon.png |
| Issue date: | 08/11/1980 |
| From: | Hoffman D CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.) |
| To: | Crutchfield D Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 8008190160 | |
| Download: ML19331C613 (2) | |
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August 11, 1980 Director, Nuclear Reactor Regulation Att Mr Dennis M CrutchficId, Chief Operating Projects Erstneh No 5 US Nuclear Regulatory Co= mission Washington, DC 20555 DOCKET 50-155 - LICZNSE DPR BIG ROCK POINT PIJET - RESPONSE TO STAFF QUESTIONS CN SPENT FUEL POOL AREA On December 19, 1979, a telephone discussion between Consumers Power Company and the NRC addressed spent fuel pool area radiation levels and monitoring.
Mr Walt 3r Paulson of your staff informed us on August 6, 1980 that responses to two questions resulting from this discussion had yet to be received. These questions involved an investigation into means to reduce radiation levels in the spent fuel pool area and existance of area monitors that alarm in the con-trol room on lov apent fue_t pool water level.
Consumers Power Company has taken =easures to reduce activity levels in the spent fuel pool area. The measures taken include recycling of the spent fuel pool coolant through the radvaste demineralizer, water lancing the veir over the surge tank and air lancing the surge tank. Wet smears on the fuel pool valls were taken for determination of crud buildup and its affect on dose rates.
The wet smears indicated very minor activity and that cleaning of the spent fuel pool valls vould not affect the overall area activity levels. The dose rates in the spent fuel pool area have been reduced by approximately h5% since December 1979 as shown by the following:
Date Fuel Pool Location (s) - (Dese Rate in tR/hr) 12/12/79 West End (1h)
Middle (1h)
East End (28)
Over Surge Tank (2h)
Water lanced weir and surge tank and recycle of fuel pool through radvaste demineralizer 02/01/80 West End (10)
Middle (12)
East End (18)
Over Surge Tank (1h) 06/0h/80 West End (12)
Middle (12)
East End (18)
Over Surge Tank (17) 07/17/80 West End ( 8)
Middle ( 6)
East End (15)
Over Surge Tank (15) 8 0 0 8.L9 0 g.6%
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Crutchfield Big Rock Point-
.8/11/80 2
Spent Fuel Fool Area Big Rock Point has two area radiation monitors in the proximity of the spent fuel pool. These monitors are located near the SW corner of the spent fuel pool and on the steam drum enclosure vall approximately thirty (30) feet from the spent fuel pool. Both monitors. alarm in the control room at approximately i
10 mR/hr activity levels. Indication of high activity levels due to low spent fuel pool water level vould be provided by these monitors in the control room.
In addition to these permanent monitors, a portable monitor has been located at the east end of the spent fuel pool which has a local alarm set at approxi-mately 100 mR/hr.
David P Hoffhan (Signed)
David P Hoffhan Nuclear Licensing Administrator CC JGKeppler, USNRC
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