ML20096A197
| ML20096A197 | |
| Person / Time | |
|---|---|
| Site: | Limerick  |
| Issue date: | 08/17/1984 |
| From: | Kemper J PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC |
| To: | Schwencer A Office of Nuclear Reactor Regulation |
| References | |
| OL, NUDOCS 8408310012 | |
| Download: ML20096A197 (3) | |
Text
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PHILADELPHIA ELECTRIC COMPANY 23OI MARKET STREET P.O. BOX 8699 b[,[
PHILADELPHI A. PA.19101 1215) 84b45o 2
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'84 AGO 24 A10 AUG 17 884 Mr. A. Schwencer, Chief DoENtkib4:.l'ch;'50-35204 Licensing Branch No. 2 50-353 0L Division of Licensing U. S. Nuclear Regulatory Conmission Washington, D.C. 20555
Subject:
Limerick Generating Station, Units 1 and 2 Meteorological and Effluent Treatment Branch Wide Range Accident Monitor Calibration Factors
Reference:
PECO and NRC Conference Call 8/15/84.
File:
GOVT 1-1 (NRC)
Dear Mr. Schwencer:
As discussed with the Meteorological and Effluent Treatnent Branch reviewer in the reference conference call pleaso find attached the additional infonnation requested concerning the High Range Noble Gas Effluent Monitor Calibration Factors.
Sincerely, blA b g
YW RJS/gra/08168403 cc: 5e0 Attached Servico List A
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ATTACl+ENT 1 LIE RICK GENERATING STATION WIDE RANGE ACCIDENT MONITOR CALIBRATION FACTORS The Wide Range Accident Monitor detector calibration factors were evaluated using the Loss-of-Coolant Accident source term presented in LGS FSAR Table 15.6-16.
.Since the isotopic mixtura of the source term changos as a function of timo following shutdown, the detector responso also changos. Over the timo period from reactor shutdown to four days after shutdown, the calibration factor changes by a factor of four.
From four days to 30 days, the calibration factor is constant.
in order to maintain the system accuracles within a factor of two in accordance with Regulatory Guide 1.97, Rev. 2, the calibration factor can be changed at appropriato Intervals following roactor
' shutdown.
The calibration factor is calculated on the basis of olther the expected Isotopic mix (FSAR) or Isotopic mix determined from a grab samplo.
On the basis of the FSAR source tenn it will be appropriato to change the calibration factor at approximately 3 hours3.472222e-5 days <br />8.333333e-4 hours <br />4.960317e-6 weeks <br />1.1415e-6 months <br />, 7 hours8.101852e-5 days <br />0.00194 hours <br />1.157407e-5 weeks <br />2.6635e-6 months <br />, 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />, 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />, 2 days, and 4 days following reactor shutdown.
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