ML17193B326
| ML17193B326 | |
| Person / Time | |
|---|---|
| Site: | Dresden  |
| Issue date: | 04/16/1981 |
| From: | Crutchfield D Office of Nuclear Reactor Regulation |
| To: | Abel J COMMONWEALTH EDISON CO. |
| References | |
| TASK-05-12.A, TASK-5-12.A, TASK-RR LSO5-81-04-018, LSO5-81-4-18, NUDOCS 8104220104 | |
| Download: ML17193B326 (3) | |
Text
UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D. C. 20555 Docket Nos. 50-10/237 LSOS-81-04-018 Mr. J.S. Abel Director of Nuclear Licensing Commonwealth Edison Company Post Office Box 767 Chicago~ Illinois 60690 Dear Mr. Abel April 16, 1981 RE:
SEP TOPIC V-12.A WATER PURITY OF BOILING WATER REACTOR PRIMARY COOLANT DRESDEN NUCLEAR POWER STATION, UNIT NOS. 1 AND 2 Enclosed is our final evaluation of SEP Topic V-12.A, 11Water Purity.of Boil-ing Water Reactor Primary Coolant.
11 Our draft evaluation sent to you by letter date June 12, 1980 stated that both Dresden Units 1 and 2 are operated in accordance with Regulatory Guide 1.56. The assessment also requested that you document this compliance.
Your response dated August 12, 1980 provided further information regarding the topic and indicated that the topic assess-ment contained an oversight regarding the existence of a conductivity meter.
We have reviewed our initial assessment and found that although there was no oversight, the wording was such that it could be so interpreted. Therefore, we have revised the evaluation to avoid further misinterpretation and removed the request for additional information. Therefore, our review of this topic is complete and this evaluation will be a basic input to the integrated safety assessment for your facility unless you identify changes_ need~d to*
reflect the as-built.conditions at.your facility. This topic assessment may be revised in the future if your facility design is changed or if NRC*criteria relating to this topic are modified before the integrated assessment is com-pleted.
Enclosure:
As stated c'c w/enclosure:
See next page 8 1 0. 4 2 2 O. / 0 'I..
p s:r; /JI j ;/;w*
Dennis M. Crutch'f.f:i1:4, e Operating Reactors Bra h #5 Division of Licensing s£o/
s 1/1
.PSIL II.!.~ ~X (I G & 11.)
Mr. J. s. Abel cc Isham, Lincoln & Beale Counselors at Law One First National Plaza, 42nd Floor Chicago, Illinois 60603 Mr. B. B. Stephenson Plant Superintendent Dresden Nuclear Power Station Rural Route. #1 Morris, Illinois 60450
- u. s. Nuclear Regulatory Commission_
Resident Inspectors Office Dresden Stat ion RR #1 Morris, Illinois 60450 Susan N. Sekuler Assistant Attorney General Environmental Control Division 188 w. Randolph Street Suite 2315 Chicago, Illinois 60601 Morris Public Library 604 Liberty Street Morris, Illinois 60451 Chairman Board of Supervisors of Grundy County Grundy County Courthouse Morris, Illinois 60450 Illinois Department of Nuclear Safety 1035 Outer Park Drive, 5th Floor Springfield, Illinois 62704 Di rector, Criteria and Standads Division Office of Radiation Programs (ANR-460)
- u. s. Environmental Protection Agency Washington, D.C.
20460
- u. s. Environmental Protection Agency Federal Activities Bran~h Region V Office ATTN:
EIS COORDINATOR 230 South Dearborn Street Chicago, Illinois 60604
SYSTEMATIC EVALUATION PROGRAM DRESDEN UNIT NOS. l AND 2
- Topic V-12.A Water Purity of Boiling Water Reactor Primary Coolant The safety objective of Topic V-12.A is to determine the degree of compliance of operating Boiling Water Reactors to the recommendations of Regulatory Guide l.56,"Maintenance of Water Purity in Boiling l~ater Reactors", and to assure that the water purity level is acceptably high to minimize the potential for intergranular stress corrosion cracking of austenitic stainless steel in the reactor coolant pressure boundary.
Regulatory Guide 1.56, Revision l, July 1978, was specifically identified by the Regulatory Requirements Review Committee for consideration for backfit on operating reactors. The Regulatory Guide describes methods acceptable to the NRC staff for implementing General Design Criteria 13, 14, 15 and 31 of Appendix A, 10 CFR Part 50.
The purpose of this review is to document whether the Dresden l and 2 facilities comply with the recommendations of Regulatory Guide 1.56 or with alternative proced~res acceptable to the staff. Our reviews were based on the information presented by the licensee in the Technical Specifications, the Final Safety Analysis Report (FSAR), and telephone con-versations with personnel at the Dresden l and 2 facilities.
The regulatory position is that the condensate demineralizers in boiling water reactors should be designed and operated to permit an orderly shutdown of the reactor in case of a serious leakage in the condenser or in other heat ex-changers without contaminating the reactor coolant pressure boundary* or core structural components with potentially harmful constituents of the condenser coolant water.
The regulatory position recorrmends recording conductivity meters be installed at the inlet and outlet of both the condensate treatment system and the reactor cleanup system.
The range of these instruments should be sufficient to measure all levels of potential water conductivity specified in the plant technical specifications. Further, for the condensate treatment system, the conductivity meter readings should be calibrated so that estimates of condenser leakage can be made based on cooling water conductivity, conden-sate conductivity, and flow rate. The chemical composition of the cooling water and its relation to specific conductance should be extablistn!d and periodically confirmed so that estimates of the residual demineral izer capacity*
can be made.
Acceptable reactor coolant water chemistry limits and conduct-
- vitY limits of the condensate system water are shown in the. regi.Jl atory guide.
We conclude from our review of the information provided by the licensee in the Technical Specific~tions and in telephone conversation with plant personnel on March 13, 1980, that the Dresden l and 2 reactors are operated in compliance with the reconmendations of Regulatory Guide 1.56, Revision l, "Maintenance of Water Purity in Boiling Water Reactors", and therefore, meet the acceptance criteria for this topic.