ML20003G104
| ML20003G104 | |
| Person / Time | |
|---|---|
| Site: | Cooper  |
| Issue date: | 04/21/1981 |
| From: | Pilant J NEBRASKA PUBLIC POWER DISTRICT |
| To: | Ippolito T Office of Nuclear Reactor Regulation |
| References | |
| LAQ8100160, NUDOCS 8104280259 | |
| Download: ML20003G104 (1) | |
Text
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$D-M T m m GENER AL OFFICE Jkl P. O. Bo x 499. ccLUMBUS. *.EB A A5KA 58631 "n%9 n Nebraska Publ.ic Power D. trict is rsLE~c~E c4m s.us.
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LQA3100160 April 21,1981
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c Director, Nuclear Reactor Regulation
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Attention:
Mr. Thomas A.
Ippolito, Chief h
Operating Reactors Branch No. 2 of Division of Licensing b/
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U.S. Nuclear Regulatory Co==ission Washingten, DC 20555
Reference:
- 1) Letter fros J. M. Pilant to T. A.
Ippolito Dated March 5, 1981, " Reload Licensing Submittal, Reload 6, Cycle 7"
Subject:
Response to NRC questions - Reload 6, Cycle 7
Dear Mr. Ippolito:
Reference i submitted for NRC approval the standard reload application for Cycle 7 at Cooper Nuclear Station.
In subsequent discussions with the staff, Nebraska Public Power District was requested to answer the following question for= ally on the Docket.
Question:
In section 13 " Stability Analysis Results" of the Supplemental Reload Licensing Sub=ittal, the decay ratio for the 7x7 channel is defined as 0.0.
For the previous cycle this value was 0.22.
Provide an a=plifying discussion.
Response
The decay ratio for a 7x7 channel during Cycle 7 has been determined to be :ero out to the fourth decimal place.
7x7 channels are typically more stable than Sx3 channels, and the few remaining in the core during Cycle 7 are located in the outer periphery and operate with a low void fraction; therefore, analytically determined stability for these channels is expected.
Due to the accelerated outage schedule for CNS, approval of the reload license amend =ent prior to May 8, 1981 is once again respectfully requested.
Sincerely, N
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M Jah.Pilant Director of Licensing and Quality Assurance
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