ML19323H611
| ML19323H611 | |
| Person / Time | |
|---|---|
| Site: | Peach Bottom  |
| Issue date: | 06/04/1980 |
| From: | Daltroff S PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC |
| To: | Harold Denton Office of Nuclear Reactor Regulation |
| References | |
| RTR-NUREG-0578, RTR-NUREG-578 NUDOCS 8006130279 | |
| Download: ML19323H611 (3) | |
Text
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e PHILADELPHIA ELECTRIC COMPANY 2301 M ARKET STREET P.O. BOX 8699 PHILADELPHI A. PA.19101 SHt ELDS L. D A LTROFF strc'Tm c PYoIc ion June 4,
1980 Mr. !!arold R.
Denton Office of Nuclear Reactor Regulation U.S.
Nuclear Regulatory Commission Washington, DC 20555
SUBJECT:
Implementation of Lessons Learned Short Tern Requirements - Peach Bottom Atomic Power S tation
REFERENCE:
Letter dated January 2, 1980, from S.L.
Daltroff to 11.
R.
Denton.
Subject:
Design Review Studies Required by Short Term Lessons Learned -
Peach Bottom Nuclear Power Station
Dear Mr. Denton:
The referenced letter under item 2.1.8b described the high range effluent noble gas monitors installed at Peach Bottom Atomic Power Station.
We have subsequently reviewed the system and the criteria set forth in your October 30, 1979, clarification letter and have concluded that the system meets the criteria specified in Table 2.1.8.b.2 with the exception of the ANSI N320-1979 specification.
Our review of vendors supplying similar equipment showed that ANSI N320-1979 criteria could not be met with presently available systems.
We discussed this matter with your staff and were informed that the ANSI N320-1979 criteria would not be required for item 2.1.8b.
Therefore, it is our intent to make no further changes in the high range noble gas monitoring system in 1980.
However, we are presently reviewing the entire monitoring system at Peach Bottom Atomic Power S tation, including the routine monitors, and expect to modify or replace as deemed appropriate to meet other related requirements.
T 1. i s work is o
8006130 jf
,. ~.
1 li r. !!arold R.
Denton Page 2 i
presently in progress with effluent monitor modifications expected in 1981.
For your background, the attached table provides a description of-the p res en t ly installed system and a comparison to j
your October 30, 1979, criteria.
- l. -
j Very truly yours, r
e Attachment 4
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o Comparison of PSAPS Noble Gas Monitors with NURm-0578 Criteria 10/30/79 Letter, Table PBAPS High Range Item 2.1.8.b.2 Requirements Noble Gas Monitors Type of Activity Noble gases only Hoble gases Range Overl p nomal monitors 0.28
-1.h x 10b uCi/cc (off-gas to 10 uCi/cc (diluted stack) See notes 1 and 2.
containment and reactor building exhaust)
Overlap nomal monitors to 7 x 10-2 -1.h x 10b uCi/cc 103 uCi/cc (buildings (building vents) See notes 1 containing primary and 2.
coolant)
Redundancy Not required No Seismic Not required No Power Vital instrument bus Safeguard power (equivalent)
Other Per R.G.1 97 and ANSI R.G. 1 97 specifications N 320-79 Display Continuous recording Continuous recording in CR with display in TSC with display available in the and EOC TSC Qualifications Not required No Note 1-The 'oottom range of 0.28 and 7 x 10-2 uCi/cc result frcxn normal instrument background. Monitor range extends down to 1.h x 10-2 uCi/cc.
Note 2:
Overlap between nomal and high range monitors is provided. Nomal off-gas stack noble gas monitors range to 13 uCi/ce; nomal building vent noble gas monitors ra ge to 2.7 uCi/cc for digital control room display and 2.7 x 10- uCi/cc for recorder.
O