ML20077C706
| ML20077C706 | |
| Person / Time | |
|---|---|
| Site: | Byron, Braidwood  |
| Issue date: | 05/14/1991 |
| From: | Checca A COMMONWEALTH EDISON CO. |
| To: | Murley T NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM), Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 9105230147 | |
| Download: ML20077C706 (2) | |
Text
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. . Commonwealth Edison C2 1400 0 pus Place
[ O Downers Grove, Illinw 60515
}
May 14, 1991 Dr. Thomas E. Murley, Director Office of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission Washington, DC 20555 Attn: Document Control Desk
Subject:
Braidwood Station Units I and 2 DCRDR Implementation NRC_.RockeDos m 50-456/457
Reference:
(a) TAC #64028 (b) February 22, 1991 letter from T.K. Schuster to T.E. Murley
Dear Dr. Murley,
Reference (b) provided the final status of nineteen Byron and Braidwood DCRDR Human Engineering Discrepancies (HED) for which the Commonwealth Edison Human Factors Group had recommended a change in implementation classification commitment. Additional information for HED-552 has been obtained and is provided for NRC staff review.
DCRDR HED No. 552 identified the lack of correspondence between the Pressurizer PORV control switch position notches and the labeled switch positions. The problem documented in HED 552 was originally identified during the Bryon and Braidwood Preliminary Design Assessment (PDA) which began in August of 1981 prior to Byron Unit l's Integrated Hot functional Testing. The problem was to be addressed by the addition of new escutcheon labels prior to unit start-up. That activity was completed at Byron Station at the time of the Detailed Control Room Design Review and consequently was not documented es an HED. However, it was not yet implemented at Braidwood and HED 552 was written.
Subsequent to the DCRDR process, and prior to the initial fuel loading of both Braidwood units, the new escutcheon labels were installed on the panel for the Pressurizer PORV control switches. At the end of the Braidwood Unit I refueling outage following the DCRDR, when the corrective action was to be implemented, the Human Factors Group verified that no problem existed, though no notification of corrective acticn implementatico had been received.
Consequently, a petition was generated to the NRC to change the response of the HED to Accept-As-Is. The NRC declined the petition and the Human Factors I
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'Dr. Thomas E. Murley May 14, 1991 Group reevaluated the problem. During that reevaluation the fact that the intended corrective action had been implemented was discerned. He have verified that the corrective action satisfactorily addressed the HED and that it did not introduce any new human engineering deficiencies.
Please direct any questions regarding this matter to this office.
Respectfully, baA . 44 &
Allen R. Checca Nuclear Licensing Administrator ARC /rg Enclosure cc: A.H. Hsia - NRR R. Pulsifer - NRR Resident Inspector - Byron Resident Inspector - Braidwood A. Bert Davis ZNLD/651:25
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