ML20031D245
| ML20031D245 | |
| Person / Time | |
|---|---|
| Site: | Brunswick  |
| Issue date: | 10/07/1981 |
| From: | Utley E CAROLINA POWER & LIGHT CO. |
| To: | Harold Denton Office of Nuclear Reactor Regulation |
| References | |
| RTR-NUREG-0737, RTR-NUREG-737, TASK-2.F.1, TASK-TM NO-81-1651, NUDOCS 8110130179 | |
| Download: ML20031D245 (2) | |
Text
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89&L Carolina Power & Light Company October 7, 1981 File: NG-3514(B)
Serial No.: NO-81-1651
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Mr. Harold R. Denton, Director
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,h United States Nuclear Regulatory Commission
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Washington, D.C.
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!b BRUNSWICK STEAM ELECTRIC PLANT UNIT NOS. 1 AND 2 g
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E DOCKET NOS. 50-325 AND 50-324
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LICENSE NOS. DPR-71 AND DPR-62 TMI ITEM II.F.1, " ADDITIONAL ACCIDENT MONITORING INSTRUMENTATION
Dear Mr. Denton:
As previously discussed in telephane conversations with your staff, Carolina Power & Light Company (CP&L) submits the following clarification to its letter of March 3, 1981, concerning NUREG-0737,
" Clarification of TMI Action Plan Requirements," Item II.F.1, " Additional Accident Monitoring Instrumentation," for the Brunswick Steam Electric Plant (BSFP).
(1) Noble Gas Effluent Monitor As stated in our letters of December 31, 1979 and March 31, 1981, CP&L is taking credit for an automatic isolation of BSEP's Reactor Building Ventilation Exhaust to preclude the release of high levels of radiation through this path. Redundant, induct radia-tion monitors provide the isolation signal to the main ventilation system and starts the Standby Gas Treatment system (SBGT) which discharges to the plant stack. All drywell vent and purge flow is exhausted to the plant stack.
Therefore, since all potential sources of high levels of radiation from the Reactor Building are exhausted to the stack, the new high range stack monitor will meet the requirement of NUREG-0737,Section II.F.1-1.
Additionally, BSEP's Reactor Building Exhaust currently is equipped with a con-tinuous radiation monitor with an upper range of at least 10-2 uCi/cc. This range is suitable for expected levels of releases prior to eximust duct isolation.
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Sampling and Analysis of Plant Effluent CP&Lispresentlypurchasingaparticulateand_ iodine-samplin[
2 system which has the capability to saiaple~the 10 uC1/cc concent-rations stipulated in NUREG-0737. The new system employs a two train sampling system which automatically switches to a.06 CFM sampling rate when high noble gas concentrations are sensed. This will allow sampling for a duration which will not cause undue exposure to those collecting the sample and the sample will be representative of the duct's effluent.
We trust this information satisfies your concerns and if you have any further questions on this subject, please contact our staff.
Yours very truly,
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E. E. Utley Executive Vice President Power Supply and Engineering & Construction JHE/1r (1900) cc:
J. Van Vliet