ML20203J086
| ML20203J086 | |
| Person / Time | |
|---|---|
| Site: | Braidwood  |
| Issue date: | 12/11/1997 |
| From: | Tulon T COMMONWEALTH EDISON CO. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| NUDOCS 9712190120 | |
| Download: ML20203J086 (1) | |
Text
. -- ____ _-______ __ _ _
Omummweahh I45mn Comguny l
100 Opus Place Downers Grove, II. 60515 5701 i
December 11,1997 U. S Nu lear Regulatory Commission Washington, D. C 20555 Attention: Document Control Desk
Subject:
Commonwealth Edison Company's Response to the Nuclear Regulatory Commission Letter dated November 13,1997 Braidwood Station Unit 1 MRf_DJcket Number: 50-456
References:
- 1. M, D, isnch letter to 1. Johnson dated November 13,1997, transmitting Projected Braidwood Station, Unit 1, End of Cycle Steam Generator Tube Leakage Due to Outer Diameter Stress Corrosion Crack Indications Restricted From Burst
- 2. December 11,1997, Meeting between the Nuclear Regulatory Commission and the Co umomvealth Edison Company regardit.g Braidwood Full Cycle Justincation in the Reference letter the Nuclear Regulatory Commission (NRC) stated that the StafTcould not accept the Commonwealth Edison Company (Comed) proposed methodology for estimating the end-of cycle steam generator tube leakage under postulated accident conditions for Byron Unit I and Braidwood Unit 1 Additionally, the StalTrequested that Comed provide justiGcation for not conducting a mid-cycle inspection at Braidwood Unit I of the outer diameter stress corrosion cracking
,)
(ODSC) flaws indications left in service. The StaiTrequested Comed to respond within 30 days.
Accordingly, Co.nEd met with the NRC during the Reference meeting to respond to these issues.
Speci0cally.
Comed evaluated world wide ODSCC data.
Comed justified a 127 gpm leak rate.
Comed stated that Braidwood had revised their Operation Evaluation to reDect the 122 gpm leak rate and administratively lowered their dose equivalent iodine (DEI) to 0.05 microcurie / gram.
Comed stated that the pending Technical Speci0 cation revision will be revised to reflect the 0.05 f microcurie / gram DEI limit by January 15,1998.
Y Comed will be submitting a report to document the leakage justiGcation by January 15,1998.
t If you have any questions regarding this correspondence, please contact this onice.
Sincerely,
[DO
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,J T i thy Tulon
' ce President, Braidwood Station ec:
Byron /Braidwood Project Manager-NRR Senior Resident in.,pector-Braidwood Regional Administrator-Rill Ollice of Nucl r Safety-IDNS
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