ML20058C128
| ML20058C128 | |
| Person / Time | |
|---|---|
| Site: | Braidwood  |
| Issue date: | 11/17/1993 |
| From: | Assa R Office of Nuclear Reactor Regulation |
| To: | Farrar D COMMONWEALTH EDISON CO. |
| References | |
| TAC-M85035, TAC-M85036, NUDOCS 9312020351 | |
| Download: ML20058C128 (5) | |
Text
_ _ _ _ _ _ _ _ _ _ _ _.
November 17, 1993
'Dbcket Nos. STN 50-456 and STN 50-457 Mr. D. L. Farrar Manager, Nuclear Regulatory Services
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Commonwealth Edison Company Executive Towers West III, Suite 500 1400 OPUS Place Downers Grove, Illinois 60515
SUBJECT:
REQUEST FOR ADDITIONAL INFORMATION ON ENVIRONMENTAL QUALIFICATION OF OK0 NITE TAPE SPLICES FOR LOCAL SUBMERGENCE AT BRAIDWOOD STATION (TAC NOS. M85035 AND M85036)
By letter dated November 21, 1991, you submitted your evaluation for environmental qualification of Okonite tape splices under local submergence i
for power and control applications at Braidwood Station. Based on our review of your submittal, and a subsequent phone call on September 13, 1993, we have determined that we need additional information to continue with our review.
The enclosed list of questions identifies the information we need.
Please review these questions and submit your response within 45 days of receipt of this letter.
I The reporting and/or recordkeeping requirements contained in this letter affect fewer than ten respondents; therefore, OMB clearance is not required 4
under P.L.96-511.
Should you have any further questions regarding this request, please contact me at (301) 504-1362.
Sincerely, OriginalSigned By:
Ramin R. Assa, Acting Project Manager 9312O20351 931117 Project Directorate III-2 PDR ADOCK 05000456 Division of Reactor Projects III/IV/V P
PDR Office of Nuclear Reactor Regulation j
Enclosure:
Request for Additional Information cc w/ enclosure:
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JRoe JZwolinski JDyer i
CMoore RAssa BClayton, RIII I
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November 17, 1993
, Docket Nos. STN 50-456
~
and STN 50-457 Mr. D. L. Farrar Manager, Nuclear Regulatory Services Commonwealth Edison Company Executive Towers West III, Suite 500 1400 OPUS P1 ace Downers Grove, Illinois 60515
SUBJECT:
REQUEST FOR ADDITIONAL INFORMATION ON ENVIRONMENTAL QUALIFICATION OF OKONITE TAPE SPLICES FOR LOCAL SUBMERGENCE AT BRAIDWOOD STATION (T N05. M85035 AND M85036)
By letter dated November 21, 1991, you submitted your evaluation for environmental qualification of Okonite tape splices under local submergence for power and control applications at Braidwood Station.
Based on our review of your submittal, and a subsequent phone call on September 13, 1993, we have determined that we need additional information to continue with our review.
The enclosed list of questions identifies the information we need.
Please review these questions and submit your response within 45 days of receipt of this letter.
The reporting and/or recordkeeping requirements contained in this letter affect fewer than ten respondents; therefore, OMB clearance is not required under P.L.96-511.
Should you have any further questions regarding this request, please contact me at (301) 504-1362.
Sincerely, OriginalSigned By:
Ramin R. Assa, Acting Project Manager Project Directorate III-2 i
Division of Reactor Projects III/IV/V Office of Nuclear Reactor Regulation
Enclosure:
Request for Additional Information j
cc w/ enclosure:
See next page DISTRIBUTION Docket File NRC & Local PDRs PDIII-2 r/f JRoe JZwolinski JDyer CMoore RAssa BClayton, RIII OGC ACRS(10) 0FC hf[tIII-2 PM:PDIII-2
.D:PDIII-2 NAME CNRk RASSA k hDYER f>k DATE b/kr/93 II lb/93 j // /n /93
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COPY kS7NO (b0 YES/NO YES/NO YES/N0 YES/NO v
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Mr. D. L. Farrar Braidwood Station i
Commonwealth Edison Company Units 1 and 2 cc:
i Mr. William P. Poirier Chairman i
Westinghouse Electric Corporation Will County Board of Supervisors j
Energy Systems Business Unit Will County Board Courthouse i
Post Office Box 355, Bay 236 West Joliet, Illinois 60434 i
Pittsburgh, Pennsylvannia 15230 Ms. Lorraine Creek j
Joseph Gallo, Esquire Rt. 1, Box 182 i
Hopkins and Sutter Manteno, Illinois 60950-I 888 16th Street, N.W., Suite 700 2
j Washington, D.C.
20006 Douglass Cassel, Esquire 17 East Monroe Street, Suite 212 i
j Regional Administrator Chicago, Illinois 60603 U. S. NRC, Region III 799 Roosevelt Road, Bldg. #4 Michael Miller, Esquire l
Glen Ellyn, Illinois 60137 Sidley and Austin One First National Plaza Ms. Bridget Little Rorem Chicago, Illinois 60690 Appleseed Coordinator 117 North Linden Street George L. Edgar Essex, Illinois 60935 Newman & Holtzinger, P.C.
1615 L Street, N.W.
Mr. Edward R. Crass Washington, D.C.
20036 Nuclear Safeguards and Licensing Division Illinois Dept. of Nuclear Safety Sargent & Lundy Engineers Office of Nuclear Facility Safety 55 East Monroe Street 1035 Outer Park Drive Chicago, Illinois 60603 Springfield, Illinois 62704 U. S. Nuclear Regulatory Commission Commonwealth Edison Company Resident Inspectors Office Braidwood Station Manager Rural Route #1, Box 79 Rt. 1, Box 84 Braceville, Illinois 60407 Braceville, Illinois 60407 Mr. Ron Stephens EIS Review Coordinator Illinois Emergency Services Environmental Protection Aoency and Disaster Agency Region V 110 East Adams Street 230 S. Dearborn Street Springfield, Illinois 62706 Chicago, Illinois 60604 Robert Neumann Office of Public Counsel State of Illinois Center 100 W. Randolph, Suite 11-300 Chicago, Illinois 60601 Attorney General 500 South 2nd Street Springfield, Illinois 62701
ZNCLOSURE RE0 VEST FOR ADDITIONAL INFORMATION i
1.
Duration of Submergence: Regulatory Guide 1.89, Section 3.a states:
" Electric equipment that could be submerged should be identified and qualified by testing in a submerged condition to demonstrate operability for the duration required. Analytical extrapolation of results for test periods shorter than the required duration should be justified."
During the September 13, 1993, phone call, the licensee stated that the splices must operate post-LOCA for up to one year. However, the test reports submitted do not document justification that a 5-minute immersion in tap water is equivalent to one year of submerged operation.
They do not show that the splices were actually submerged for 25 or 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> during the tests as claimed by the licensee, or that these times are representative of one year post-LOCA operation. The licensee also stated that the 72-hour rubmergence test did not envelope in-containment applications.
The licensee should provide documentation to justify that the splices will be operable for the duration required while submerged and that test results envelope the worst case environment for these splices.
2.
Chemical Solution for Submergence: NUREG-0588, Section 2.2.(8) states:
" Caustic spray should be incorporated during simulated event testing at the maximtm pressure and at the temperature conditions that would occur when the onsite spray systems actuate."
The licensee has not shown that the splices will operate in post-accident submergence in the same solution they would be exposed to during a design-basis event. Tap water or condensate were not shown to be equivalent to the chemical solution. The composition of the 25 hour2.893519e-4 days <br />0.00694 hours <br />4.133598e-5 weeks <br />9.5125e-6 months <br /> chemical spray was not shown to be equivalent to the Braidwood environment.
The licensee should provide documentation to justify that the chemical solution that splices could be exposed to in the plant is represented by test conditions.
3.
Test Voltage: NUREG-0588, Section 2.2.(7) states:
" Performance characteristics of equipment shcald be verified before, after, and periodically during testing throughout its range of required operability." Section 2.4.3.2 of IEEE Standard 383-1974 states:
"The cable should function electrically throughout its exposure to the environmental extremes within the specified electrical parameters" (rated voltage and current).
The voltage used during the tests was insufficient to qualify the 4kV/600VAC/250VDC applications.
The licensee should provide documentation to show test voltages that are equivalent to the voltages used in plant applications.
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Similarity to Field Splices:
IEEE Standard 323-1974, Section 5.1 states
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that type testing of actual equipment using simulated service conditions is the preferred method of testing.
l The licensee has not provided documentation to show that the splices used in the type tests are the same materials and construction as the I
splices in service at Braidwood.
The licensee should provide documentation, including procedural guidance, to justify that the splices in the plant are the same as those tested.
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