ML19312B938
| ML19312B938 | |
| Person / Time | |
|---|---|
| Site: | Oconee  |
| Issue date: | 11/30/1973 |
| From: | Thies A DUKE POWER CO. |
| To: | Anthony Giambusso US ATOMIC ENERGY COMMISSION (AEC) |
| Shared Package | |
| ML19312B939 | List: |
| References | |
| NUDOCS 7911270726 | |
| Download: ML19312B938 (6) | |
Text
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AEC D7IBUTION FOR PART 50 DCCKET W 'tIAL (TEMFORARY FCRM)
C01CROL NO: 8583 s
FILE:
FRCM:
DATE OF DOC DATE REC'D LTR MEMO RPT OTHER Duke Power Company Charlotte, N. C. 28201 11-30-73 12-3-73 X
A. C. Thies TO:
A. Giambusso 3 signed SENT LOCAL PDR X CLASS UNCLASS PROP INFO INPUT NO CYS REC ' D DOCKET NO:
XXX y y)(
42 (50-26 D 70 DESCRIPTION:
ENCLOSUPIS:
Ltr notarzied 11-30-73, requesting change to -Info review of requested alodifi-l Tcch. Spec......... trans the f ollowing:
cations to Tech Spec - Proposed rdplacement pages for the Oconee Tech Spec vu avr EEMOVE ACKNOWLEDGED PLANT NAME:
Oconee Unit 1 & 2
( 3 Orig & 39 cys rec'd )
FOR ACTION /INFORMATION 12-7-73 GC BUTLER (L) dCEENCER(L)
ZIDIANN(L)
REGAN(E)
W/ Copies W/ 9 Copies W/ Copies W/ Copies CLARK (L)
STOLZ(L)
DICKER (E)
W/ Copies W/ Copics W/ Copies W/ Copies GOLLER(L)
VASSALLO(L)
KNIGHTON(E)
W/ Copies W/ Copies W/ Copies W/ Copies KNI2L(L)
SCHEMEL(L)
YOUNGBLOOD(E)
W/ Copics W/ Copies W/ Copies W/ Copies INTERNAL DISTRI3UTION REG FILE]
TECH REVIE*J DENTON A/T IND
/AEC PCR HENDRIE GRIMES LIC ASST BRAIDIAN
/ 0CC, ROCM P-506A SCHROEDER GAMMILL DIGGS (L)
SALTZMAN yMUNTZING/ STAFF MACCARY KASTNER GEARIN (L)
B. HURT CASE KNIGHT BALLARD
/ CULBOURNE (L)
PLANS GIAMBUSSO PAWLICKI SPANGLER LEE (L)
MCDONALD BOYD SHAO MAIGRET (L) vtUBE MCORE (L)(BWR)
STELLO ENVIRO SERVICE (L)
/DEYOUNG(L)(PWR)
HOUSTON MULLER SHEPPARD (E)
INFO SKOVHOLT (L)
NOVAK DICKER SMITH (L)
C. MILES P. COLLINS ROSS KNIGHTON TEETS (L)
A. Cabell (ltr)
IPPOLITO YCUNGBLOOD WADE (E) jREG OPR TEDESCO REGAN WILLIAMS (E)
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1-CONSULTANT' S 1-AGMED(Ruth Gusscan)
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November 30, 1973 l'
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5 DEC 3 1973
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'N REGULATORY a i, f,
O cIKEN 6
.f Mr. Angelo Giambusso P[/ 4(4'n Deputy Director for Reactor Projects co!O J
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Directorate of Licensing f
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Office of Regulation C
U. S. Atomic Energy Cocmission Q <.
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Washington, D. C.
20545 s ',g ' -Q
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Re:
Oconee Units 1 and 2 9 / :- \\'/
Docket Nos. 50-269 and 50-270
Dear Mr. Giambusso:
The Oconee Nuclear Station Technical Specifications, Appendix A to Facility Operating Licenses DPR-38 and DPR-47, require that the reactor be operated such that quadra t tilt is maintained within certain prescribed limits (Technical Specification 3.5.2.4), and specify certain limitations on control rod positions (Technical Specification 3.5.2.5).
It is requested that these technical specifications be modified as follows:
1.
If quadrant power tilt exceeds 4 percent, pover will be reduced 2 percent for each 1 percent tilt.
Furthermore, reactor protec.tive setpoints and limits will be lowered if quadrant power tilt cannot be reduced to less than 4 percent within four hours.
2.
new set of control rod withdrawal limits are provided for Oconee Unit 1.
Control rod withdrawal limits presently in the technical specificaticas will be specified for use for Oconee Unit 2.
3.
If the control rbd position limits are exceeded, corrective measures shall be taken immediately to, achieve an acceptable control rod position.
Acceptable control rod positions must be attained within four hours.
4.
Except for physics tests, power will c-t be increased above 92 percent unless the xenon reactivity is within 90 percent of the equilibrium value-for operation at rated power.
C3Nb
s Mr. Angelo Giambusso Page 2 November 30, 1973 5.
Provisions to permit physics testing outside the power-imbalance envelope is made. provides the required information for your review and approval of these requested modifications. is replacement pages for the Oconee Technical Specifications, showing the requested changes.
Very truly yours, A. C. Thies ACT:vr Attachments A. C. THIES, being duly sworn, states that he is Senior Vice President of Duke Power Company; that he is authorized on the part of said company to sign and file with the Atomic Energy Commission this request for amendment j
of the Oconee Nuclear Station Technical Specifications, Appendix A to j
Facility Operating Licenses DPR-38 and DPR-47; and that all statements i
and matters set forth therein are true and correct to the best of his knowledge.
A. C. Thies, Senior Vice President i
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p J hn C. Goodman, 3r.'
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sistant Secretary Subscribed and sworn to before me this 30th day of November, 1973.
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Notary Public My Commission Expires:
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ATIACHMENT 1 1
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INFORMATION FOR REVIEW OF REQUESTED MODIFICATIONS TO TECHNICAL SPECIFICATIONS 3.2.5.4 AND 3.5.2.5 e
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OCONEE 1 OPERATING LIMITS Increased flexibility in power maneuvering has been provided Oconee 1 by th$e i
following modifications:
1.
Reduction in quadrant tilt limit from 5% to 4% at rated power.
The limits at reduced powers have been lowered from as high as 20% tilt at 80% power and 10% at 90 power to 4% at 92% power, by requiring a 2 to 1 power reduction for higher tilts.
This reduction in quadrant tilt limits (tilts are unexpected) has allowed raising the threshold power.
2.
The previous limits from BAW-10078 were established for Oconee 2 fuel densification peaking penalties.
The revised ILmits are developed using Oconee 1 fuel densification peaking penalties.
Oconee 1 fuel initial theoretical density is 93.5% compared to 92.5% for oconee 2.
3.
Oconee 1 operating power peaks are utilized which are %3.5% lower than Oconee 2 peaks during time of maximum peaking conditions (BOL power maneuvering).
The operating limits for Oconee Unit 1 are developed using the exact methods described in BAW-10078.
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BASIC DIFFERENCES BETWEEN OCONEE 1 AND OCONEE 2 PEAKING PENALTIES e
1.
Naminal differences in average heat rate based on 93.5% theoretical density fuel in Oconee 1 and 92.5% theoretical density fuel in Oconee 2.
Oconee 1 5.74 Kw/ft Oconee 2 5.77 Kw/ft credit 1.0052 2.
Average difference in power spike factor resulting from fuel density difference.
(Difference varies axially and is treated locally.)
Credit - f*f
= 1.021 3.
Difference in peaking resulting from reduction of quadrant tilt limit from 5% to 4%.
Credit = 1.0164 i
4.
Difference in peaking in Oconee 2 between normal operation and axially dependent Kw/ft limit Minimum Credit = 1.023 (at about 7', page 4-7 BAW-10078) 5.
Difference in peaking (basic) as indicated in fuel densification reports for Oconee 1 and Oconee 2.
6.
Basic difference in red insertion figures for establishing lower ' power cut off level between Oconee 2 and Ocon' e 1.
(The Oconee 2 figures contain a 2% power uncertainty.)
Credit = 1.02 4
r mm