ML20094N764
| ML20094N764 | |
| Person / Time | |
|---|---|
| Site: | Limerick  |
| Issue date: | 08/10/1984 |
| From: | Kemper J PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC |
| To: | Schwencer A Office of Nuclear Reactor Regulation |
| References | |
| OL, NUDOCS 8408160379 | |
| Download: ML20094N764 (3) | |
Text
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PHILADELPHIA ELECTRIC COMPANY '
2301 MARKET STREET P.O. BOX 8699 PHILADELPHI A. PA.19101 JOHN S. KEMPER
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AUG 101984 Mr. A. Schwencer, Chief Docket Nos.:
50-352 Licensing Branch No. 2 50-353 U. S. Nuclear Regulatory Conmission Washington, D.C. 20555
Subject:
Limerick Generating Station, Units 1 and 2 Request for Additional Information Instrurentation Setpoint Methodology
Reference:
1)
A. Schwencer to E. G. Bauer, Jr., dated August 25, 1982.
File:
GOVT 1-1 (NRC)
Dear Mr. Schwencer:
The reference 1 letter requested additional information on the methodology used to establish Limerick's Reactor Protection System (RPS) and Engineered Safety Feature (ESF) instrumentation setpoints.
This information is provided in the attached draft FSAR pages that will be incorporated into the FSAR via revision 36 which will be submitted in Septenber 1984.
We believe that this information closes SER confinnatory issue #26.
Sincerely,
& Of G Y'
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8408160379 840810 PDR ADOCK 05000352 E
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DRAET QUESTION 421.32 (7.1, 7.3)
Provide a detailed discussion _on the methodology used to establish the trip setpoint and allowable value for each Reactor Protection System-(RPS) and Engineered Safety Feature (ESF) channel.
Include the following Information:
a)
The trip value asstmed in the FSAR Chapter 15 analyses.
b)
The margin between the contined channel error allowance and the total channel error allowance asstsned in accident
- analysis, c)-
The values assigned to each component of the combined channel error allowance (e.g., process measurement accuracy, suiisor calibration accuracy, sensor drift, sensor environmental allowances, _ instrtsnent rack drift) the basis for these values, and the methodology used to stm these errors.
d)
The degree of conformance to the guidance provided in Regulatory Guide 1.105 Positions C.1 thru C.6.
DRAET
RESPONSE
These Setpoint Methodology concerns will be addressed by the Action Plan submitted in the reference 421.32-1 letter.
Limerick endorses the work scope and schedule proposed by the Actton Plan, which was accepted by the NRC staff in the reference 421.32-2 letter.
References 421.32-1 Letter, J. F. Carolan (Chairman, LRG Instrtmentation Setpoint Methodology Group) to T. M. tbvak (Assistant Director for Licensing, Division of Licensing), " Action Plan to Answer the NRC Staff concerns on Setpoint Methodology for General Electric Supplied Protection System Instrtsnentation,"
June 29, 1984.
421.32-2 Letter, B. J. Youngblood (Chief, Licensing Branch No. 1, Division of Licensing) to J. F. Carolan, " Acceptance of Action Plan to Answer NRC Staff Concerns on Setpoint Methodology for General Electric Supplied Protection System Instrtsnentation," July 23, 1984.
DFC/gra/08068407 i
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