ML18348A790
| ML18348A790 | |
| Person / Time | |
|---|---|
| Site: | Palisades  |
| Issue date: | 04/16/1976 |
| From: | Owsley G Consumers Power Co, Exxon Nuclear Co |
| To: | Purple R Office of Nuclear Reactor Regulation |
| References | |
| Download: ML18348A790 (2) | |
Text
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E)${0N ~UCLEAR COMPANY, Inc.
2101 Horn'1fapids.'Road, Richland, Washington 99352.
PHONE: (509) 946-9621 Director of Nuclear Re.actor Regulation Attention:
R. A. Purple, Chief Operating Reactor Branch No. 1 U. S. Nuclear Regulatory Commission Washington, D.C.
20S5S.
April 16,
- 1976
Reference:
Docket No. 50-255 License No. DPR-20 Palisades Plant
Dear Mr. Purple:
The enclosed information is.submitted directiy at the request of Mr. R. B.
Sewell of Consumers Power.
This information is provided in response to your question. regarding the extent of metal-water reaction as part of the.,
ECCS analysis for Type D fuel.
~-
GFO: lp Enclosure Sincerely,
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.. Owsley, Reload Licensin AN AFFILIATE OF EXXON CORPORATION 4082
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- s EXTENT OF LOCAL MAXIMUM METAL.
- WATE.R 'REACTION PALISADES CYCLE 2 ECCS ANALYSIS The value reported for 11 D'.
1 fuel Loop 2 *break (XN-:76-4, Supplement 1, p~ge 6) is 11 less* than 13 percent.
11 The value reported for 110 11 fuel*toop*.l break cleanup calculation was 11 less than 17 percent.
11 These* two numbers ~ere.£onservatively ~stimated in order to expedite th~*documentation'of the EC~S a~alysis.
This was possible at that time as the ~xtent of metal-water reaction was clearly less.than the Appendi~ K limit.
A refined estimate of metal-water reaction shows the ~xt~nt to be* less than the cited ]3and*17 percent.
The refined estimates.for the Loop 2 and Loop l breaks are r~specti ve ly b.etween 8 - 9.percent and be.tween 9 - l 0 percent, the latter correspondi n*g. to the s ii ghtly higher PCT case.
it should be noted that the peak metal-wate~ reaction node is the ruptured no~e and not the PCT ~ode.
Th~ extent of.the ~etal-water reaction in all other nodes is significantly less than that of the rupture node.