ML15112A741

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Forwards Request for Addl Info Re Util 990727 Requested Amend to Oconee Nuclear Station,Units 1,2 & 3 Tss.Amend Would Incorporate Keowee Hydro Unit Voltage & Frequency Protection Mod Surveillance Requirements
ML15112A741
Person / Time
Site: Oconee  Duke Energy icon.png
Issue date: 08/30/1999
From: Labarge D
NRC (Affiliation Not Assigned)
To: Mccollum W
DUKE POWER CO.
References
TAC-MA6157, TAC-MA6158, TAC-MA6159, NUDOCS 9909010069
Download: ML15112A741 (4)


Text

Mr. W. R. McCollum, Jr.

A Vice President, Oconee Site Duke Energy Corporation P. 0. Box 1439 Seneca, SC 29679

SUBJECT:

REQUEST FOR ADDITIONAL INFORMATION - OCONEE NUCLEAR STATION, UNITS 1, 2, AND 3 (TAC NOS. MA6157, MA6158, AND MA6159)

Dear Mr. McCollum:

By letter dated July 27, 1999, Duke Energy Corporation requested an amendment to the Oconee Nuclear Station, Units 1, 2, and 3 Technical Specifications. The amendment would incorporate the Keowee Hydro Unit's voltage and frequency protection modification surveillance requirements by adding new Surveillance Requirement (SR) 3.8.1.17. As a result of its review, the staff has determined that additional information is needed in order to continue our review as shown in the enclosure. This request has been discussed with Renee Gambrell of your staff and a response date of October 7, 1999, established.

Sincerely, Original signed by:

David E. LaBarge, Senior Project Manager, Section 1 Project Directorate 11-2 Division of Licensing Project Management Office of Nuclear Reactor Regulation Docket Nos. 50-269, 50-270, and 50-287

Enclosure:

Request for Additional Information cc w/encl: See next page Distribution:

c1Docket File DLaBarge PUBLIC OGC PD 11-1 R/F ACRS SBlack COgle, Rll CHawes JLazevnick Document Name: G:\\PDII-l\\OCONEE\\OA6157RAl.WPD To receive a copy of this document, indicate in the box:.

"C" = Copy without attachment/enclosure "E" = Copy with attachment/enclosure "N" = No copy OFFICE PM:PDII/S1 LA:PDII/S1 SC:PDII/S1 NAME DLaBarge:cn CHawes Mfl REmch DATE

/24 /99

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& /299 OFFICIAL RECORD COPY 9909010069 990830 PDR ADOCK 05000269 P

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-0 0 UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 August 30, 1999 Mr. W. R. McCollum, Jr.

Vice President, Oconee Site Duke Energy Corporation P. 0. Box 1439 Seneca, SC 29679

SUBJECT:

REQUEST FOR ADDITIONAL INFORMATION - OCONEE NUCLEAR STATION, UNITS 1, 2, AND 3 (TAC NOS. MA6157, MA6158, AND MA6159)

Dear Mr. McCollum:

By letter dated July 27, 1999, Duke Energy Corporation requested an amendment to the Oconee Nuclear Station, Units 1, 2, and 3 Technical Specifications. The amendment would incorporate the Keowee Hydro Unit's voltage and frequency protection modification surveillance requirements by adding new Surveillance Requirement (SR) 3.8.1.17. As a result of its review, the staff has determined that additional information is needed in order to continue our review as shown in the enclosure. This request has been discussed with Renee Gambrell of your staff and a response date of October 7, 1999, established.

Sincerely, David E. LaBarge, Senior Project Manager, Section 1 Project Directorate 11-2

'Division of Licensing Project Management Office of Nuclear Reactor Regulation Docket Nos. 50-269, 50-270, and 50-287

Enclosure:

Request for Additional Information cc w/encl: See next page

Oconee Nuclear Station cc:

Ms. Lisa F. Vaughn Mr. L. E. Nicholson Legal Department (PBO5E)

Compliance Manager Duke Energy Corporation Duke Energy Corporation 422 South Church Street Oconee Nuclear Site Charlotte, North Carolina 28201-1006 7800 Rochester Highway Seneca, South Carolina 29672 Richard W. Blackburn Winston and Strawn Ms. Karen E. Long 1400 L Street, NW.

Assistant Attorney General Washington, DC 20005 North Carolina Department of Justice Mr. Rick N. Edwards 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 28201-1006 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 Virgil R. Autry, Director Division of Radioactive Waste Management Mr. Steven P. Shaver Bureau of Land and Waste Management Senior Sales Engineer Department of Health and Environmental Westinghouse Electric Company Control 5929 Carnegie Blvd.

2600 Bull Street Suite 500 Columbia, South Carolina 29201-1708 Charlotte, North Carolina 28209 Honorable Harrison Orr County Supervisor of Oconee County Walhalla, South Carolina 29691

00 REQUEST FOR ADDITIONAL INFORMATION As stated in the submittal, the surveillance requirement (SR) would "verify each Keowee KHU's voltage and frequency out of tolerance logic trips and blocks closure of the appropriate overhead or underground power path breakers. The allowable values shall be as follows:

a. Undervoltage 12.42 kV
b. Overvoltage 15.18 KV
c. Underfrequency 54 hz
d. Overfrequency 66 hz" The staff requests the following additional information be submitted to allow us to determine that the proposed tests a, e adequate to ensure the operability of the protective relays:
1. Either provide an explanation for not including an upper and lower limit for each allowable value or revise the submittal to include such allowable values. Without such limits, the out of tolerance protection could trip Keowee when the tests have shown that the voltage and frequency are not out of tolerance.
2. Provide an explanation or revise the submittal to include a requirement to test the allowable value of the timers.
3. It is the staff's understanding that the tests may not, if fact, cause the breakers to open if closed or ensure that they cannot be closed if open. Please discuss this aspect of the testing process and how the tests ensure that the SR is satisfied.
4. Provide a discussion of how the analytical value was chosen for the frequency and voltage out of tolerance protection. Also, provide a discussion of the uncertainties that were used to derive the allowable values.