ML20247G207
| ML20247G207 | |
| Person / Time | |
|---|---|
| Site: | McGuire, Mcguire  |
| Issue date: | 07/20/1989 |
| From: | Tucker H DUKE POWER CO. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| NUDOCS 8907270356 | |
| Download: ML20247G207 (2) | |
Text
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N 4
DmCE POWER GOMI%NY P.O. DOX 33180 011ARLOTTE. N.o. 28242 HALB.TUGKER Tzternows
..:::"""X, July 20, 1989 U. S. Nuclear Regulatory Commission Washington, D. C.
20555 Attention: Document Control Desk
Subject:
Duke Power Company McGuire Nuclear Station Docket Nos. 50-369, 370 Outstanding HED's In a telephone conference call held with NRC staff members on June 12, 1989, we discussed outstanding issues on HED's (Human Engineering Discrepancies) associated with McGuire's ESF Monitor Light Panel, Annunciators, and HVAC Panel.
During this call, staff concurrence with our alternate plans for resolving the-HEDS on the ESF Monitor Light Panel and Annunciators was obtained. However, the NRC staff indicated that an additional submittal, providing enhancement for safety significant components, would be required for the HVAC Panel.
I am hereby providing this document as an attachment to this letter.
Please contact J. S. Warren (704) 373-2627 of my Regulatory Compliance staff if additional input is needed on this matter.
Very truly yours, b k t' f4 H. B. Tucker JSW364/lcs xc:
Mr. D. S. Hood, Project Manager U. S. Nuclear Regulatory Commission Office of Nuclear Reactor Regulation Division of Reactor Projects Washington, D. C.
20555 Mr. P. K. VanDoorn Sr. Resident Inspector U. S. Nuclear Regulatory Commission, Region II McGuire Nuclear Station Mr. S. D. Ebneter, Administrator U. S. Nuclear Regulatory Commission, Region II b3 g(
a ta r a 1 \\
8907270356 890720 DR ADOCK 05000369 FDC
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'i McGuire Nuclear Station HVAC Control Panel HED's Supplemental Submittal This supplement is in response to a June 12 teleconference between Duke Power and NRC personnel concerning a previous submittal on McGuire HVAC Control Panel HED's.
In that teleconference, nine questions were discussed and all were resolved with the exception of one dealing with HED M-1-0520.
Further elaboration was requested on the evaluation of safety significant HVAC components that was conducted, including a re-review of control board surface enhancements that could be made for those components.
l l
As discussed in the teleconference, Duke's position is that the HVAC Control Panel is full but not overcrowded. Components are not squeezed on the control board but follow accepted Duke spacing and design standards.
It is acknowledged that due to the fullness of the control panel, optimum arrangement within j
systems and train related panels was not always achieved; however, based on the normal and emergency use of the panel, this is not judged a problem.
Justification for this includes the fact that the vast majority of controls and indications are not safety significant (they do not mitigate accident effects) and they are used during normal operation in a non-critical manner (no time urgency associated with use).
Duke's previous submittal on the HVAC Control Panel HED modifications did not elaborate on specific safety significant controls even though they had been reviewed. As discussed in the teleconference, a follow-up review was conducted of McGuire Emergency Procedures (EP's) that require operator interaction with the HVAC Control Panel. The following safety significant components requiring procedural verification in abnormal or emergency modes were identified:
System Equipment Indication VC (Control Room Control Room AHU On t
Cooling)
Control Area AHU On Control Room Outside Air On Pressure Fans Control Room Area Chiller on VE (Annulus Annulus Ventilation Fan On Ventilation)
VX (Containment Hydrogen Skimmer Fan on Air Return and Containment Air Return Fans (2)
On Hydrogen Skimmer)
All equipment consists of A and B train components and these control panel components are contained within their respective unit, system and train panel locations. Upon review of EP verification of these components, additional surface enhancement has been determined beneficial.
Specifically, a white background will be applied to all EP HVAC components for more efficient location by the operator of these key components. This background will highlight the component by providing a sufficiently wide background around it.
Schedule This additional enhancement will be also completed by the end of the Unit 1 E0C6 refueling outage.
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