ML20039B249
| ML20039B249 | |
| Person / Time | |
|---|---|
| Site: | Big Rock Point File:Consumers Energy icon.png |
| Issue date: | 12/15/1981 |
| From: | Dewitt R CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.) |
| To: | |
| Shared Package | |
| ML20039B245 | List: |
| References | |
| RTR-NUREG-0737, RTR-NUREG-737, TASK-2.F.1, TASK-TM NUDOCS 8112220458 | |
| Download: ML20039B249 (2) | |
Text
CONSUMERS POWER COMPANY Docket 50-155 f
Request for Change to the Technical Specifications License Dfh-6 For the reasons hereinafter set forth, it is requested that the Technical Specifications contained in the Facility Operating License DPR-6, Docket 50-155, issued to Consumers Power Company on May 1,1964, for the Big Rock Point Plant be changed as described in Section I below:
I.
Changes Replace section 6.4.1.(b), Stack Gas Monitoring System with the following:
"(b)
There shall be an isokinetic probe, permanently fixed ir. the stack approximately one-third up from the base, to collect stack gas and particulate samples that are withdrawn with a gas pump through flow-metering and regulating equipment. The monitoring system will be divided into a high range (accident) monitor consisting of a removable particulate and iodine filter and an ion chamber for noble gas monitoring and a normal range monitor consisting of a gamma scintillation detector monitoring the removable particulate and iodine filters and downstream of this, a beta scintillation detector for noble gas monitoring. The gas flow is automatically switched f rom the normal to the high range monitor for high activity samples. The filters for the normal range monitor shall be removed and checked for radicactive contamination as specified in Section 6.4.3(b).
The equipmeni shall permit determinatjon of {ission gas activities and gaseous r etivation products from 10 to 10 uCi/cc. The system shall have a nigh radiation alarm which shall be annunciated in the control room. The alarm setting is specified in Section 6.4.3(b).
Replace Section 6.4.3(b), Operating Requirements with the following:
"(b)
The stack-gas monitoring system shall normally be in service. With the monitoring system inoperable, restore to operable status within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />, or, in lieu of any other report required by Specification 6.9.2, prepare and submit a Special Report to the Commission pursuant to Specification 6.9.4 within the next 14 days outlining the cause of the inoperability and the plans for restoring the system to OPERABLE status.
The alarm normally shall be set to annunicate in the control room at a level that corresponds to a stack release rate of 0.1 Curie per second.
At stack release rates above 0.1 Curie per second, the alarm shall be set approximately a factor of two ab'ove the expected stack release rate, but in no event above 0.47/E Curies per second.
oc1281-0014a142 8112220458 811215 PDR ADOCK 05000155 P
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2 1
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The calibration of the normal and high range monitoring system shall be check at least monthly. _ The particulate and iodine filters of the normal range monitor shall be analyzed at least weekly.
(The' filters of 4
the high-range monitor are not used during normalloperation.)"
f
. Add to Section 6.9.4:
1 f
'"(d)~ Stack. Gas' Monitoring System Reports."
II.
Discussion The operability of the Stack Gas Monitoring System ensures that sufficient radiological data is available for estimating potential radiation doses to the public as a result of ruitine or accidental release of radioactive materials through the plant stack. This capability is required to evaluate the need'for initiating protective measures to protect the_ health and safety of the pablic. '(This-instrumentation is consistent with the recommendations of NUREG-0737,Section II.F.1 - Attachments 1 and 2, and is designed to meet the requirements of a category 2 system per Regulatory Guide 1.97.)
III.
Conclusion Based on the foregoing, both the Big Rock' Point Plant Review Committee and the Safety and Audit Review Board have reviewed these changes and find them-acceptable.
CONSUMERS POWER COMPANY l
By MM R B DeWitt, Vice President Nuclear Operations Sworn and subscribed to before_me this 15th day of December, 1981.
D f,
Helen I Dempski, Notary f6' lic b
Jackson County, Michigan My commission expires December 14, 1983.
oc1281-0014a142