ML20150B127
| ML20150B127 | |
| Person / Time | |
|---|---|
| Site: | Quad Cities  |
| Issue date: | 03/09/1988 |
| From: | Johnson I COMMONWEALTH EDISON CO. |
| To: | Murley T Office of Nuclear Reactor Regulation |
| References | |
| 4094K, NUDOCS 8803160175 | |
| Download: ML20150B127 (2) | |
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Commonwoolth Edloon One Fird N"ional Plaza Chicago, librxis v
Addres.s Reply to: Post Offco Box 767 Chicago, titiros 60690 0767 March 9, 1988 Mr. Thomas E. Murley, Director Office of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission Washington, DC 20555
Subject:
Quad Cities Station Units 1 and 2 Discharge Pipe Pressure for Core and Containment System Technical Specification 3.5.G.2 NRC Docket Nos. 50-254 and 50-265 References (a):
Letter from M.S. Turbak to T.E. Murley dated October 6, 1987.
i (b):
Letter from G. Halihan to L.D. Butterfield October 6, 1987.
(c):
Letter from I.M. Johnson to T.E. Murley dated November 24, 1987.
(d): Letter from T. Ross to L.D. Butterfield February 3, 1988.
Dear Mr. Murley:
In Reference (a), Commonwealth Edison requested to amend our Technical Specifications for Quad Cities Station Units 1 and 2.
The change pertained to the manner by which we maintain the HPCI and RCIC discharge pipe level.
By Reference (b), we received a waiver of compliance for this specification for the time period during which this amendment was being reviewed. The submittal was subsequently supplemented via Reference (c), in i
which we agreed to change the surveillance requirements from monthly to 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />. The amendment request was reviewed and approved by your staff in Reference (d).
In recent discussions with members of your staff, we became aware of concerns raised in regards to the review of a similar amendment for the Duane Arnold Energy Center.
In that review, the staff voiced concerns regarding the possibility that the high pressure reector coolant could leak into the core spray, low pressure coolant injection, high-pressure coolant injection, in reactor core isolation cooling systems, thereby possibily forming vapor
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T.E. Murley March 9, 1988 pockets. These vapor pockets apparently can contribute to steam water hammer upon startup of the systems, commonwealth Edison commits to review this potential problem for applicability to the Quad Cities Station.
It is our intent to complete review of this matter within 60 days.
Please direct any questions you may have regarding this matter to this office.
Very truly yours, J
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I. M. Joh. on Nuclear Licensing Ad istrator 1m cc:
T. Ross - NRR Quad Cities Resident Inspector 4094K