ML20042F685
| ML20042F685 | |
| Person / Time | |
|---|---|
| Site: | Byron, Braidwood  |
| Issue date: | 05/04/1990 |
| From: | Hunsader S COMMONWEALTH EDISON CO. |
| To: | Murley T NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM), Office of Nuclear Reactor Regulation |
| References | |
| 0939T, 939T, NUDOCS 9005090250 | |
| Download: ML20042F685 (2) | |
Text
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Dr. Thomas E. Murley, Director Office of Nuclear Reactor Regulation U.S. Nuclear. Regulatory Conumission Washington, D.C.
20555 Attnt Document Control Desk
Subject:
Byron Station Units 1 and 2 Braidwood Station Units 1 and 2 Containment Leak Chase Channels e
NRC_DackstLNosa_.10-ASA/AM_and_10-AML41Z i
Referencet (a) NRC Inspection Report Nos. 50-454/86035/
50-455/86022 dated October 2, 1986 l
(Byron Station).
(b) NRC Inspection Report Nos. 50-456/86023; dated February 13, 1986.
(c) April 29, 1987 S.C. Ilunsader letter to T.E. Murley.
(d) February 2, 1988 S.C. Ilunsader letter to T.E. Murley.
l (e) September 21, 1988 S.C. Ilunsader letter to T.E. Murley.
(f) January 30, 1989 S.C. Ilunsader letter i
to T.E. Murley.
Dear Dr. Murley Reference (a) provided the results of the NRC Region 111 inspection of containment integrated leak rate testing (CILRT) performed at Byron Station Units 1 and 2.
Reference (b) provided the results of the same kind of inspection at Braidwood Unit 1.
Open Items 50-454/86035-02: 456/86022-03 and 456/86023-01 required Commonwealth Edison Company to submit to NRR the justification for performing Type A tests with the leak chase channel plugs installed.
Reference (c) provided that justification for Braidwood Units 1 and 2.
Reference (d) applied that justification to Byron Station Units 1 and 2.
On September 16, 1988, the NRC staff provided comments via a teleconference in regard to reference (d).- At the conclusions of the teleconference additional information was determined to be required by the NRC staff to facilitate their review. Reference (e) provided that information.
9005090250 900504 PDR ADOCK 05000454 g
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Dr'. T.E. Murley May 4, 1990 On November 29, 1988, a second teleconference was held whereby Attachment D to ref erence (e) was discussed. The NRC staff requested that stress calculations be provided regarding the seismic effects on the leak chase channel with a comparison being made to code allowables as given in ASME Section III, Subsection NE.
Attachment A to reference (f) provided SLL calculation 5.2.6.1, Rev. 9 (pages 229 through 241) to address that request.
It is Commonwealth Edison's understanding that the submittals made to the NRC staff have addressed the NRC staff's questions and concerns. To date, Commonwealth Edison has not received any correspondence regarding the result of the NRC staff's review. Byron Station Unit 2 will be entering a refueling outage (B2 R02) September 1 1990 at which time the next CILRT will be performed.
Commonwealth Edison desires that the issues surrounding the performance of the CILRT be resolved prior to the initiation of planning of activities for the Unit 2 CILRT. As a result, Commonwealth Edison requents that the NRC staff complete their reviews and provide their written evaluation by June B, 1990.
Please address any questions or concerns regarding this subject to this office.
Very truly yours,
(. $ w. ~ r b ~ ~.
S.C. Ilunsader Nuclear Licensing Administrator Attachments
/Inw/ Scil 0939T cc P. Shemanski - Project Manager, NRR S. Sands - Project Manager, NRR NRC Resident Inspector - liraidwood NRC Resident Inspector - 11yron W. Shafer - Region III
/0939T10