ML20101F528
| ML20101F528 | |
| Person / Time | |
|---|---|
| Site: | Byron, Braidwood  |
| Issue date: | 07/28/1989 |
| From: | Parker M ILLINOIS, STATE OF |
| To: | Sands S Office of Nuclear Reactor Regulation |
| References | |
| 89-78, NUDOCS 9206250010 | |
| Download: ML20101F528 (1) | |
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STATE OF ILLINOIS DEPARTMENT OF NUCLEAR SAFETY 1035 OUTER PARK drive -
SPRINGF1 ELD 62704 (217) 785-9900 TERRY R. LASH vuly 28,1989 gg,, g g
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Mr. S. Sands, Project Manager Office of Nuclear Reactor Regulation U. S. Nuclear Regulatory Commission Washington, DC.
20555 1
In Response Please Refer 10: 89-78
Dear Mr. Sands:
The Illinois Department of Nuclear Safety is concerned with the attached amendment request submitted by Commonwealth Edison Company cn March 17, 1989. This amendment is applicable to Syron Units 1 and 2, and to Braidwood Units 1 and 2.
If approved, this amendment would delete the requirement for surveillance of tne emergency core cooling systen discharge lines at there-units when they are in normal operating mode (MODE 1).
The requirer.ent at present is that surveillance is to take place every 31 days inclusive of the normal operating mode.
4 Inasmuch as these units are likely to remain in normal operation mode for extended periods, the effect of this amendment will be to substar,tidly reduce surveillance venting of the emergency core cooling systems at these plants.
_A failure cf the emergency core cooling systems would significantly increase the 4
consequenr.es of a loss of coolant accident. Our concern is that reducing-the fregaency of surveillance will -increase the likelihood of such a failure going undetrated. We are not convincert that the Al ARA considerat ions expressed by Comnonwealth Edison Company are of sufficient import t9 justify the reduction in the frequency of surveillance. We would appreciate your taking our views into account in your consideration of this matter.
S cer ly
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ll ti e P rker, Chief 4
Division of Engineerinq i
MP:dsk JW p1,
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