ML19312C894
| ML19312C894 | |
| Person / Time | |
|---|---|
| Site: | Oconee  |
| Issue date: | 08/26/1975 |
| From: | Parker W DUKE POWER CO. |
| To: | Boyd R Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML19312C895 | List: |
| References | |
| NUDOCS 8001130067 | |
| Download: ML19312C894 (4) | |
Text
-_
n NRC DISTRIBUTION FOR PART 50 D' CKET MATERIAL O
(TEMPORARY FORM)
CONTROL NO:
9313 FILE:
FROM:
Duke Power Co.
DATE OF DOC DATE REC'D LTR TWX RPT OTHER Charlotte, N.C.
28242 8-26-75 9-2-75 XX Wm. O. Parker. Jr.
TO:
ORIG CC OTHER SENT NRC PDR XX Mr. Roger S. Boyd 1 signed SENT LOCAL PDR XX CLASS UNCLASS PROPINFO INPUT NO CYS REC'D DOCKET NO:
XXX 1
l M 287 DESCRIPTION: Ltr notarized 8-26-75 requesing ENCLOSURES:
Replacement pages for the for revision of the Oconee Tech Specs pertainir g Oconee Tech Specs....
to modification of the safety limits for the rcactor thermal power & power imbalance combination & the (1 cy encl rec'd)
-y + p r RPS flux-flow & power-im alance trip setpoints 4
& trans the following:
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OconeeUnits 2 & 3 O
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FOR ACTION /INFORMATION DHL 9-6-75 BUTLER (L)
SCHWENCER (L) ZIEMANN (L)
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GI AM BUSSO SHAO SPANG LE R' J. LEE (L)
PLANS BOYD STELLO M. RUJHBROOK(L)
MCDONALD MOORE (L)
HOUSTON ENVIRO S. REED (E)
CHAPMAN DEYOUNG (L)
NOVAK MULLER M. SERVICE (L) h:2 ~INbg SKOVHOLT (L)
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PETERSON P. CO LLINS TEDESCO YOUNGBLOOD H. SMITH (L)
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DENISE J. COLLINS REGAN S. TEETS (L)
KLECKER REG OPR LAIN AS OJECT LDR G. WILLI AMS (E)
EISENHUT WILE & REGION (2)
BENAROYA Leffj V. WILSON (L)
WIGGINTON MIPC VOLLMER "HA R LESS R. INGRAM (L)
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a 8A August 26, 1975
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e 6t. m Mr. Roger S. Boyd, Acting Director Division of Reactor Licensing g'-,., S g. _,h_~.-
U. S. Nuclear Regulatory Commission
' 'w.
Washington, D. C.
20555 i
,-...s Re:
Oconee Nuclear Station Docket Nos. @ -287 o
Dear Mr. Boyd:
This letter constitutes Duke Power Company's application for revision of the Oconee Nuclear Station Technical Specifications, pursuant to 10CFR30, 550.90.
The proposed revision pertains to Oconee Units 2 and 3 and modifies (1) the safety limits for the reactor thermal power and power imbalance combination and (ii) the Reactor Protection System (RPS) flux-flow and power-imbalance trip setpoints.
The existing core safety limits and RPS envelopes were developed using core offset limits established by the " worst case peaking" that may occur throughout core lifa, including beginning-of-life power peaking.
1 The beginning-of-life power peaks, however, decrease with fuel burnup.
Because both Unit 2 and Unit 3 have attained core burnups beyond 100
)
EFPD, the core offset limits have been reevaluated taking into account j
the reduction in the beginning-of-life power peaks.
The proposed power-imbalance core safety limits take into account a burnup of 100 EFPD for each of the units, and the proposed RPS power-imbalance trip setpoints are based on a more restrictive out-of-core to incore i
offset correlation than the one used in generating the existing RPS power-imbalance trip setpoints.
Maximum thermal power for three-pump operation has been changed from 86.0% FP to 86.5% FP in order that application of error adjustment factors be consistent with other B&W units.
l The proposed revision in imbalance limits necessitates a reduction of the flux / flow ratio from 1.07 to 0.961 for single loop operation in order to provide adequate margin from the revised imbalance safety limits.
Attached are replacement pages 2.1-3b, 2.1-8, 2.1-9, 2.3-1, 2.3-2, 2.3-3, 2.3-4, 2.3-9, 2.3-10, 2.3-12, and 2.3-13 of the Oconee Nuclear 9313
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Mr. Roger S. Boyd Page 2 August 26, 1975 StationTechnicab. Specifications. Proposed changes are identified by vertical lines in the margin of the replacement pages.
3 Timely approval of this proposed revision is requested.
Forty copies of this request, including three signed originals, are enclosed.
/
V y truly yours, [
b y
~_ l.D. a %
- William O. Parker, Jr.
PMA:vr Enclosures a
i
Mr. Roger S. Boyd Page 3 August 26, 1975 WILLIAM 0. PARKER, JR., being duly sworn, states that he is Vice President of Duke Power Company; that he is authorized on the part of said Company to sign and file with the Nuclear Regulatory Commission this request for amendment of the Oconee Nuclear Station Technical Specifications, Appendix A to Facility Operating Licenses DPR-38, DPR-47 and DPR-55; and that all statements and matters set forth therein are true and correct to e best of his iwledge.
b)-
LL., )
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a.A William O. Parker, Jr., e{ce President ATTEST:
I n
/AssistantSecretary olin 'C. Goodman, Jr7
/f l
Subscribed and sworn to before me this 26th day of August, 1975.
Notary Public My Commission Expires:
1