ML20210H083
| ML20210H083 | |
| Person / Time | |
|---|---|
| Site: | Catawba  |
| Issue date: | 09/17/1986 |
| From: | Tucker H DUKE POWER CO. |
| To: | Harold Denton, Youngblood B Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML20210H088 | List: |
| References | |
| NUDOCS 8609260070 | |
| Download: ML20210H083 (2) | |
Text
.
o DUKE POWER GOMPANY P.O. BOX 03180 CHAML0frTE, N.C. 28942 HAL H. TUCKER n g,,,,,o,,,
m -"
September 17, 1986 Mr. Harold R. Denton, Director Office of Nuclear Reactor Regulation U. S. Nuclear Regulatory Commission Washington, D. C.
20555 Attentions Mr. B. J. Youngblood, Project Director PWR Project Directorate No. 4 Ret Catawba Nuclear Station, Units 1 and 2 Docket Nos. 50-413 and 50-414
Dear Mr. Denton:
Per the September 8, 1986 and September 16, 1986 telephone calls between members of your staff and Duke Power employees, please find attached a clarification to our Technical Specification amendment request dated August 4, 1986.
The intent of the proposed change to Table 3.7-1 was to allow the unit to remain in Mode 3 with full system temperature and pressure so that testing of the main steamline code relief valves may be performed. This was to be ensured by setting the Reactor Protective System power range trip setpoints to zero.
Setting the power range trip setpoint to zero has been determined to be inadvisable. The station startup procedure calls for withdrawing shutdown banks in Mode 3 for preparation to deborate and to have available an adequate amount of negative reactivity for insertion into the core.
If the power range trip setpoints are set at zero, a reactor trip signal will be generated, causing insertion of the shutdown banks.
Additionally, the safety grade steamline PORV's will be available to control pressure if the normal mode of heat removal is lost. Also, licensed reactor operators are trained in the operation of the safety grade PORV's.
This clarification to the Technical Specifications would still limit plant operation to no more than Mode 3 conditions (suberitical operation) but would allow for a more orderly startup of the unit.
If you have any further questions, please advise.
Very truly yours, NA
- 0e,t J
Hal B. Tuckee i
RWO/25/ sib B609260070 860717 M CK 0 hDR Attachment L
I Mr. Harsld R. De: ton, Dirceter September 17, 1986 Page Two xc:
Dr. J. Nelson Grace, Regional Administrator U. S. Nuclear Regulatory Commission Region II 101 Marietta Street, NW, Suite 2900 Atlanta, Georgia 30323 Mr. Heyward Shealy, Chief Bureau of Radiological Health South Carolina Department of Health &
Environmental Control 2600 Bull Street Columbia, South Carolina 29201 INPO Records Center Suite 1500 1100 Circle 75 Parkway Atlanta, Georgia 30339 American Nuclear Insurers e/o Dottie Sherman, ANI Library The Exchange, Suite 245 270 Farmington Avenue Farmington, CT 06032 M&M Nuclear Consultants 1221 Avenue of the Americas New York, New York 10020 NRC Resident Inspector Catawba Nuclear Station
- _ _ _ _ - _ _ _ _