ML20002D136
| ML20002D136 | |
| Person / Time | |
|---|---|
| Site: | Big Rock Point File:Consumers Energy icon.png |
| Issue date: | 10/28/1966 |
| From: | Morris P US ATOMIC ENERGY COMMISSION (AEC) |
| To: | Haueter R CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.) |
| Shared Package | |
| ML20002D137 | List: |
| References | |
| NUDOCS 8101190511 | |
| Download: ML20002D136 (3) | |
Text
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UNITED STATES E COW ATOMIC ENERGY COMMISSION r
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onn e OCT 2 81966 m ausy m7m ro' Docket No. 50-155 Consumers Power Company 212 West Michigan Avenue Jackson, Michigan 49201 Attention:
Mr. Robert L. Haueter Change No. 11 Gentlemen:
This refers to your request, received September 8,1966, for authori-zation, pursuant to Section 50.59, 10 CFR 50, of proposed Change No. 11 to the Technical Specifications of License No. DPR-6 issued to Consumers Power Company on May 1, 1964, for the Big Rock Point Nuclear Plant. The proposed change would allow the use of scintillation detectors (as presently authorized) or ion chambers in the air ejector off-gas moni-toring system.
We have reviewed the proposed change and found that it does not present significant hazards considerations not described or implicit in the hazards summary report, and that there is reasonable assurance that the health and safety of the public will not be endangered. Accordingly, Section 6.4.1(a) of the Technical Specifications is deleted and replaced with a new Section 6.4.1(a) as follows:
"(a) Air Elector Off-Gas Monitoring System Continuous monitoring of the air ejector off-gas radio-activity shall be provided by either two ion chamber type systems or two single-channel gamma scintillation spectrometer systems designed to detect noble gas fission products indicative of a fuel element rupture.
One system (either ion chamber or scintillation detector) will always be in service with an identical system as an operational spare. The sampling system shall be designed to hold up the gas sample to allow time for the decay of Nitrogen-16 and other short-lived activation gases. The off-gas monitoring channels shall be calibrated so that the indicated and recorded count rate output of the channel in service, combined with the off-gas flow, permit f/W/90S//
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OCT 2 61906 i
Consumers Power Company.
determination of the fission gases discharge rate from 10-4 to 10 curies per second at the stack. A trip circuit in the air ejector off-gas monitor shall have an alarm which shall annunciate in the control room.
l The air ejector off-gas monitor trip circuit shall also initiate action of a time-delay wwitch, which in turn shall trip' the of f-gas shutoff valve closed after a preselected delay adjustable up to 15 minutes.
Alarm and trip settings shall be as specified in Section 6.4.3(a)."
A copy of the related Safety Evaluation by the Research and Power Reactor Safety Branch ~is enclosed.'
Sincerely yours, ORIG!NAL SIGNED BY Peter A. Morris Peter A. Morris, Director Division of Reactor Licensing
Enclosure:
AEC Safety Evaluation See attached sheet for other concurrences.
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determination of the fission gases discharge rate from
' 10-4 to 10 curies per second at the stack. A trip circuit in the air ejector off-gas monitor shall have an alarm which shall annunciate in the control room.
The air ejector off-gas monitor trip circuit shall also. initiate action of a time-delay switch, which in turn shall trip' the off-gas shutoff valve closed after 4 preselected delay adjustable up to 15 minutes.
Alarm and trip settings shall be as specified in Sectioa 6.4.3(a)."
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A copy of the related Safety Evaluation by the Research and Power Reactor Branch is enclosed.
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'N Sincerely your;,
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,\\ eter A. Morris, Director P
Division of Reactor Licensing N
Enclosure:
N AEC Safety Evaluation
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Distributio Doc. Room bec:
H. J. McAlduff,ORO Formal /
fy, E. Tremel, IP Suppl.N R. Leith, OC D3L Reading W. B. Cottrell, ORNL R&PRSE Reading Orig: JShea C. Henderson E. G. Case H. Shapar L. Kornblith (2) l N. Stoner (5)
R. Huard G. Page D. Skovholt H. Steele B. Grimes
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