ML20151V333
| ML20151V333 | |
| Person / Time | |
|---|---|
| Site: | Waterford  |
| Issue date: | 09/08/1998 |
| From: | Chandu Patel NRC (Affiliation Not Assigned) |
| To: | Dugger C ENTERGY OPERATIONS, INC. |
| References | |
| TAC-M96366, NUDOCS 9809140245 | |
| Download: ML20151V333 (4) | |
Text
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g Mr. Charles M. Dugger September 8, 1998 Vice President Operations Entergy Operations, Inc.
P. O. Box B Killona, LA 70066
SUBJECT:
REQUEST FOR ADDITIONAL INFORMATION CONCERNING COMBUSTION ENGINEERING OWNERS GROUP (CEOG) TOPICAL REPORT ON REACTOR TRIP CIRCUIT BREAKER SURVEILLANCE FREQUENCY EXTENSION (TAC NO. M96366)
Dear Mr. Dugger:
The Nuclear Regulatory Commission staff is reviewing the subject Topical Report and the Waterford Steam Electric Statio 1, Unit 3, Technical Specification change request dated July 17,1996.' We have determined that additionalinformation is needed to complete our evaluation. Enclosed is the staff's request for the additionalinformation. Please provide your response within 45 days from the date of this letter.
Sincerely, ORIGINAL' SIGNED BY:
I Chandu P. Patel, Project Manager Project Directorate IV-1 Division of Reactor Projects lil/IV Office of Nuclear Reactor Regulation Docket No. 50-382
Enclosure:
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,o September 8, 1998 Mr. Charles M. Dugger Vice President Operations Entergy Operations, Inc.
P. O. Box B Killona, LA 70066
SUBJECT:
REQUEST FOR ADDITIONAL INFORMATION CONCERNING OOMBUSTION ENGINEERING OWNERS GROUP (CEOG) TOPICAL REPORT ON REACTOR TRIP CIRCUlT BREAKER SURVEILLANCE FREQUENCY EXTENSION (TAC NO. M96366)
Dear Mr. Dugger:
The Nuclear Regulatory Commission staff is reviewing the subject Topical Report and the Waterford Steam Electric Station, Unit 3 Technical Specification change request dated July 17,1996. We have determined that additional information is needed to complete our evaluation. Enclosed is the staff's request for the additionalinformation. Please provide your response within 45 days from the date of this letter.
Sincerely, Ak.L< 0 Y Ll Chandu P. Patel, Project Manager Project Directorate IV-1 Division of Reactor Projects lil/IV Office of Nuclear Reactor Regulation Docket No. 50-382
Enclosure:
As stated cc w/ encl: See next page
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Mr. Charles M. Dugger Entergy Operations, Inc.
Waterford 3 cc:
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Administrator Regional Administrator, Region IV Louisiana Radiation Protection Division U.S. Nuclear Regulatory Commission Post Office Box 82135 611 Ryan Plaza Drive, Suite 1000 Baton Rouge, LA 70884-2135 Arlington,TX 76011 Vice President, Operations Resident inspector /Waterford NPS Support Post Office Box 822 Entergy Operations, Inc.
Killona, LA 70066 P. O. Box 31995 Jackson, MS 39286 Parish President Council St. Charles Parish.
Director P. O. Box 302 Nuclear Safety & Regulatory Affairs
. Hahnville, LA 70057 Entergy Operations, Inc.
j P. O. Box B Executive Vice-President Killona, LA 70066 and Chief Operating Officer Entergy Operations, Inc.
Wise, Carter, Child & Caraway P. O. Box 31995 P. O. Box 651 Jackson, MS 39286-1995 Jackson, MS 39205 Chairman General Manager Plant Operations Louisiana Public Service Commission Entergy Operations, Inc.
One American Place, Suite 1630 l
P. O. Box B Baton Rouge, LA 70825-1697 Killona, LA 70066 Licensing Manager Entergy Operations, Inc.
P. O. Box B Killona, LA 70066 Winston & Strawn 1400 L Street, N.W.
Washington, DC 20005-3502
o REQUEST FOR ADDITIONAL INFORMATION REACTOR TRIP CIRCUlT BREAKER SURVEILLANCE FREQUENCY EXTENSION COMBUSTION ENGINEERING OWNERS GROUP TOPICAL REPORT CE NPSD-951 WATERFORD STEAM ELECTRIC STATION, UNIT 3 1.
The Waterford 3 description of the proposed changes indicates that each Reactor Trip Circuit Breaker (RTCB) is tested (open and closed) at least 57 times during a refueling cycle (3 during shutdown,18 monthly, and 36 quarterly). Appendix A of the Topical Report identified only 39 tests on each RTCB (3 during shutdown,18 monthly and 18 quarterly). Explain why the quarterly tests are different in these two documents.
2.
Appendix A of the Topical Report states that the unreliability of the RTCBs at CE units is 0.6E-4 per demand. Explain the methodology used to arrive at this unreliability value.
3.
For one inoperable RTCB channel, the Combustion Engineering Plants Standard Technical Specifications (NUREG-1432) limiting condition for operation (LCO) action requires opening the affected RTCB in one hour but a note applicable to this action allows the inoperable RTCB to remain closed for up to an additional hour for performance of an RPS channel functional test (initiation logic, other RTCBs, and manual trip channels). However, the CEOG Topical Report and the Waterford 3 submittal recommend extending the closure time of an inoperable RTCB, to permit testing of other RTCBs, from one hour to two hours. Waterford 3 also proposed extending the LCO action completion time to two hours. Clarify the inconsistency between the two documents and provide additionaljustification for the proposed extension.
ENCLOSURE