ML20216D001
| ML20216D001 | |
| Person / Time | |
|---|---|
| Issue date: | 05/14/1998 |
| From: | Essig T NRC (Affiliation Not Assigned) |
| To: | Rausch T COMMONWEALTH EDISON CO. |
| References | |
| PROJECT-691 NUDOCS 9805190473 | |
| Download: ML20216D001 (4) | |
Text
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t UNITED STATES g
j NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 30656-0001 o%...../
May 14, 1998 l
Thomas J, Rausch l
Chairman, BWROG Commonwealth Edison Company Nuclear Fuel Services 1400 Opus Place Downers Grove, IL 60515
SUBJECT:
APPROVAL OF CHANGES TO NEDO-32339, SUPPLEMENT 4
Reference:
Letter T. J. Rausch (BWROG) to USNRC, " Transmittal of Errata to l
NEDO-32339, Supplement 4," October 20,1997.
Dear Mr. Rausch:
l The referenced letter provides information about a proposed modification to the staff approved i
document " Reactor Long Term Stability Solution: Enhanced Option I A Generic Technical Specifications," NEDO-32339, Supplement 4. The change adds the concept of the altemative l
trip reference setpoints to the Technical Spe c0 cations (TS). These setpoints are an entirely j
redundant set of trip reference setpoints whic;T an replace the setpoints which are used during l
normal operation. These setpoints prescribe op @g limits intended to protect the safety limit I
and, as such, are specifically included in the cor3 operating limits report (COLR). The alternative trip reference setpoints are primarily atended to be used during operation with reduced feedwater temperature. Revisions t0 the bases documentation are discussed in the I
referenced letter which state that appropr' ate plant specific feedwater temperature limits requiring a transition to the atlernative tr'.p reference setpoints will be included in the COLR.
l Twelve hours to switch operating limits is acceptable because it allows time to check and, if necessary, recalibrate each trip reference card. During the time following a feedwater event needing an operating limit change, protection is provided by the restricted region from the primary set of limits and the Period Based Detection System. Furthermore, the reduction in feedwater temperature does not increase the likelihood of a flow event which could lead to an instability.
l A means of controlling which set of values to use is needed and this must ba insuded in the TS. This is done by modifying Footnote b to Table 3.3.1.1-1 to read as follows:
,)
" Allowable values specified in the COLR. Allowable value modification reauired by the h
COLR due to reductions in feedwater temoerature may be delaved for uo to 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />."
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T.Rausch May 14, 1998 t
The staff has reviewed this change and concludes that it does not invalidate the previous September 20,1996, safety evaluation report (SER) on NEDO-32339, Supplement 4. You should publish a new version of NEDO-32339-A that includes this letter, as well as the September 20,1996, SER.
Sincerely, Thomas Essig, Acting Chief Generic issues and Environmental Branch Division of Reactor Program Management Office of Nuclear Reactor Regulation Project No. 691 cc: See next page l
l i
1 l
l I
Project No. 691 j
Boiling Water Reactor Owners Group cc:
Thomas J. Rausch, Chairman W. Glenn Warren Boiling Water Reactor Owners' Group Southern Nuclear / Georgia Power l
Commonwealth Edison Company E.I. Hatch Nuclear Plant l
Nuclear Fuel Services PO Box 1295 M/C B052 l
1400 Opus Place,4th Floor ETWill Birmingham, AL 35201 l
Downers Grove,IL 60515 Carl D. Terry Dennis B. Townsend Vice President, Nuclear Engineering GE Nuclear Energy Niagara Mohawk Power Corporation M/C 182 Nine Mile Point-2 175 Curtner Avenue l
PO Box 63 San Jose, CA 95125 l
Lycoming, NY 13093 Drew B. Fetters Thomas A. Green l
PECO Energy GE Nuclear Energy l
Nuclear Group Headquarters Mail Code 182 l
MC 62C-3 175 Curtner Avenue l
965 Chesterbrook Blvd.
San Jose, CA 95125 Wayne, PA 19087 John Hosmer Commonwealth Edison Executive Towers,4th Floor l
1400 Opus Place Downers Grove, IL 60515 l
George T. Jones Pennsylvania Power & Light MC A6-1 Two North Ninth Street Allentown, PA 18101 i
Lewis H. Sumner Southern Nuclear / Georgia Power E. l. Hatch Nuclear Power Plant 40 inverness Parkway
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PO Box 1295 Birmingham,GA 35201 John Kelly New York Power Authority 14th Floor Mail Stop 14K 4
Centroplex Building 123 Main Street White Plains, NY 10601 i
d T. Rausch
-2 May 14, 1998 i
l-l The staff has reviewed this change and concludes that it does not invalidate the previous l
September 20,1996, safety evaluation report (SER) on NEDO-32339, Supplement 4. You should publish a new version of NEDO-32339-A that includes this letter, as well as the September 20,1996, SER.
i Sincerely, Original Signed By:
Thomas Essig, Acting Chief Generic issues and Environmental Branch Division of Reactor Program Management Office of Nuclear Reactor Regulation Project No. 691 cc: See next page DISTRIBUTION:
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