ML20002C786
| ML20002C786 | |
| Person / Time | |
|---|---|
| Site: | Big Rock Point File:Consumers Energy icon.png |
| Issue date: | 11/05/1974 |
| From: | Sewell R CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.) |
| To: | US ATOMIC ENERGY COMMISSION (AEC) |
| References | |
| NUDOCS 8101100863 | |
| Download: ML20002C786 (3) | |
Text
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s REGZL ORY D00KETFILE COPY Consumers power Gru,p Company
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Directorate of Licensing I
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Docket 50-155 Re:
y;'g License DPR-6 US Atomic Energy Commission Big Rock Point Washington, DC 205h5 Gentlemen:
The Deterr.ination issued for the Big Rock Point Plant by the Director of Regulation, USAEC, on August 5,197h required that reports be submitted et least every three months describing Consumers Power Company's efforts with respect to achieving compliance with the Interim Acceptance Criteria (IAC). This letter is to provide the required report.
Consumers Power Company previously made modifications to provide a capability for continuous feed-water addition and proposed Techical Specifications changes to provide operability requirements for the con-tinuous feed-water capability and limit linear heat generation rates in an effort to achieve, to the maximum extent possible at that time, com-pliance with the IAC. These modifications and proposed Technical Speci-fications changes were acknowledged by the AEC in the August 5,1974 Determination and the proposed Technical Specifications changes have been subsequently approved. In addition, efforts were under way on August 5, 197h and still are under way to speed the manufacture and delivery of components that have an effect on the date the installation of the Reactor Depressurization System (RDS) can be completed. This installa-tion vill bring the Big Rock Point Plant in full conformance with the IAC.
The item that has the greatest effect on completing the installa-tion is the automatic actuation system. A parallel path approach for pro-totype testing end procurement of components was devised in July 1974 to reduce the scheduled delivery time. In addition, development of a manual actuation system was undertaken at that time as a precautionary measure in the event the parallel path effort is not successful or other unfore-seen delays occur. The status of these efforts is discussed below.
1.
Automatic Actuation System The work at Bailey Meter Company (actuation system, vendor) is continuing on a pa allel path effort. Component procurement is proceeding simultaneously with the pilot model development of several of the key sys-tem modules. Engineering design of the system is also being carried out on the basis of the prototype module development results. This parallel 11 "
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License DPR-6 Big Rock Point November 5, 1974 path effort represe ts some degree of risk should the pilot development program cause any..gnificant changes in the module schematic configura-tion or parts list. No problem areas have been identified as of this reporting date and an early equipment delivery of September 1,1975 presently appears achievable.
2.
Interim Manual Actuation System The conceptual design of a manual actuation system has been completed. This design is based on the use of all RDS components other than the actuation system input and output cabinets. The design utilizes the separation and independence features that are presently designed into the total RDS. These features are considered important to the interim system for the same reasons that they are incorporated in the automatic system; namely, to provide initiation when required and to minimize the probability of inadvertent operation. Additionally, use of present com-ponents vill allow a smooth and controlled transition from manual to automatic actuation with a minimum of plant downtime.
This manual actuation system will only be installed if the delivery date for the automatic actuation system slips significantly beyond September 1, 1975 Procurement of components peculiar to the manual actuation system are being scheduled compatible with the fore-going described purpose.
Yours very truly,
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L AAA RBS/ map Ralph B. Sewell Nuclear Licensing Administrator CC: JGKeppler, USAEC
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