ML19260C264
| ML19260C264 | |
| Person / Time | |
|---|---|
| Site: | Hatch  |
| Issue date: | 11/27/1979 |
| From: | Lainas G Office of Nuclear Reactor Regulation |
| To: | Ippolito T, Ziemann D Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML19260C265 | List: |
| References | |
| NUDOCS 7912260131 | |
| Download: ML19260C264 (2) | |
Text
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NUCLEAR REGULATORY COMMISSION 5
j WASHINGTON, D, C. 20555 NOV 2 71979 MEMORANDUM FOR:
T. Ippolito, Chief Operating Reactors Branch #3 Division of Operating Reactors D. Ziemann, Chief Operating Reactors Branch #2 Division of Operating Reactors FROM:
G. Lainas, Chief Plant Systems Branch Disision of Operating Reactors
SUBJECT:
AVERAGE POWER RANGE MONITOR SETPOINTS Georgia Power Company requested a change in the Hatch 1 and 2 Technical Specifications regarding the adjustment of the setpoints on the Average Power Range Monitors ( APRM's).
During the course of the review, the Reactor 'afety Branch raised the question of whether or not channel gain djustments should be used to change the APRM " margin to trip."
lant Systems Branch was then asked (TACs 10850 and 11848) to rr..iew this aspect.
Our Safety Evaluation Report is enclosed. We have determined that during normal full power operation the use of the gain adjustment instead of the setpoint calibration procedure is not a justifiable deviation from the principles of IEEE-279. However, during reactor startup and apprcach to full power, the gain adjustment may be used, within certain limitations, to change the APRM " margin to trip."
After completing our review of this matter, we also find no reason to conclude that this question is unique to Hatch. Our determination should have general applicability to all BWR's. We propose that this evaluation be considered the PSB position and be applied to all other BWR's.
The Reactor Safety Branch has concurred in this evaluation.
I id-V G. Lainas, Chief Plant Systems Br nch Division of Operating Reactors
Enclosure:
As stated 1616 267 cc: See next page 1
7912260 l
T. Ippolito D. Ziemann NOV 2 71979
Contact:
J.T. Beard, X28213 cc w/ enclosure:
D. Eisenhut P. Check G. Lainas D. Tondi R. Scholl D. Verrelli P. Shemanski V. Rooney J.T. Beard J. Shea H. VanderMolen B. Morris F. Coffman R. Riggs 1616 268
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