ML15112A555
| ML15112A555 | |
| Person / Time | |
|---|---|
| Site: | Oconee  |
| Issue date: | 01/20/1998 |
| From: | Labarge D NRC (Affiliation Not Assigned) |
| To: | Mccollum W DUKE POWER CO. |
| References | |
| TAC-M99487, TAC-M99488, TAC-M99489, NUDOCS 9801280045 | |
| Download: ML15112A555 (4) | |
Text
January 20, 199 Mr. W. R. McCollum Vice President, Oconee Site Duke Energy Corporation P. O. Box 1439 Seneca, SC 29679
SUBJECT:
REQUEST FOR ADDITIONAL INFORMATION - EMERGENCY CONDENSER CIRCULATING WATER SYSTEM AMENDMENT - OCONEE NUCLEAR STATION UNITS 1, 2, AND 3 (TAC NOS. M99487, M99488, AND M99489)
Dear Mr. McCollum:
By letter dated August 28, 1997, Duke Energy Corporation submitted amendments to the Oconee Nuclear Station, Units 1, 2, and 3, Technical Specifications to modify the Emergency Condenser Circulating Water System. During our review, we have discovered the need for additional information as described in the enclosure. We request your response within 30 days of receipt of this letter.
Sincerely, ORIGINAL SIGNED BY:
David E. LaBarge, Senior Project Manager Project Directorate 11-2 Division of Reactor Projects - 1/11 Office of Nuclear Reactor Regulation Docket Nos. 50-269, 50-270, and 50-287
Enclosure:
As stated cc w/encl: See next page MJ E E Distribution:
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LBerry OGC COgle, Rll DOCUMENT NAME: G:\\OCONEE\\OCO99488.RAI To receive a copy of this document, indicate in the box:
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NAME DLare:cn L-Berry,.
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NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 January 20, 1998 Mr. W. R. McCollum Vice President, Oconee Site Duke Energy Corporation P. 0. Box 1439 Seneca, SC 29679
SUBJECT:
REQUEST FOR ADDITIONAL INFORMATION - EMERGENCY CONDENSER CIRCULATING WATER SYSTEM AMENDMENT - OCONEE NUCLEAR STATION UNITS 1, 2, AND 3 (TAC NOS. M99487, M99488, AND M99489)
Dear Mr. McCollum:
By letter dated August 28, 1997, Duke Energy Corporation submitted amendments to the Oconee Nuclear Station, Units 1, 2, and 3, Technical Specifications to modify the Emergency Condenser Circulating Water System. During our review, we have discovered the need for additional information as described in the enclosure. We request your response within 30 days of receipt of this letter.
Sincerely, David E. LaBarge, Senior Project Manager Project Directorate 11-2 Division of Reactor Projects - III Office of Nuclear Reactor Regulation Docket Nos. 50-269, 50-270, and 50-287
Enclosure:
As stated cc w/encl: See next page
Oconee Nuclear Station cc:
Mr. Paul R. Newton Mr. J. E. Burchfield Legal Department (PBO5E)
Compliance Manager Duke Energy Corporation Duke Energy Corporation 422 South Church Street Oconee Nuclear Site Charlotte, North Carolina 28242 P. 0. Box 1439 Seneca, South Carolina 29679 J. Michael McGarry, Ill, Esquire Winston and Strawn Ms. Karen E. Long 1400 L Street, NW.
Assistant Attorney General Washington, DC 20005 North Carolina Department of Justice Mr. Robert B. Borsum P. 0. Box 629 Framatome Technologies Raleigh, North Carolina 27602 Suite 525 1700 Rockville Pike L. A. Keller Rockville, Maryland 20852-1631 Manager - Nuclear Regulatory Licensing Manager, LIS Duke Energy Corporation NUS Corporation 526 South Church Street 2650 McCormick Drive, 3rd Floor Charlotte, North Carolina 28242-0001 Clearwater, Florida 34619-1035 Mr. Richard M. Fry, Director Senior Resident Inspector Division of Radiation Protection U. S. Nuclear Regulatory North Carolina Department of Commission Environment, Health, and 7812B Rochester Highway Natural Resources Seneca, South Carolina 29672 3825 Barrett Drive Raleigh, North Carolina 27609-7721 Regional Administrator, Region II U. S. Nuclear Regulatory Commission Atlanta Federal Center 61 Forsyth Street, S.W., Suite 23T85 Atlanta, Georgia 30303 Max Batavia, Chief Bureau of Radiological Health South Carolina Department of Health and Environmental Control 2600 Bull Street Columbia, South Carolina 29201 County Supervisor of Oconee County Walhalla, South Carolina 29621
REQUEST FOR ADDITIONAL INFORMATION EMERGENCY CONDENSER COOLING WATER SYSTEM OCONEE NUCLEAR STATION
- 1.
Provide system diagrams or markups for new and existing systems showing proposed pipe sizes and piping classifications.
- 2.
Were the essential siphon vacuum (ESV) pumps evaluated for internally generated missiles? What are the results? If not, why is it not necessary?
- 3.
How were the ESV and siphon seal water systems evaluated for high and moderate energy line breaks? What are the results? If not, why is it not necessary?
- 4.
For portions of a system that has piping that is not seismically qualified, how does Oconee ensure that a pipe break will not adversely affect fulfilling the safety function?
For example, on page 11 in Attachment 3, Oconee states that portions of the ESV are Class F (seismic) and others are Class G (nonseismic).
- 5.
In the emergency condenser circulating water functional test, will the occurrence of the unassisted siphon be verified by delaying the initiation of the ESV pumps by 2 minutes, as it would in a loss of offsite power (LOOP)? If not, why is it not necessary?
- 6.
What, if any, controls are needed to ensure that the unassisted siphon occurs following a LOOP? What, if any, alternate actions could be taken?
- 7.
In the ESV surveillance test, will the float valve heat tracing be tested for operability?