ML20035E750
| ML20035E750 | |
| Person / Time | |
|---|---|
| Site: | Maine Yankee |
| Issue date: | 04/07/1993 |
| From: | Frizzle C Maine Yankee |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| Shared Package | |
| ML20035E751 | List: |
| References | |
| CDF-93-58, MN-93-38, NUDOCS 9304190200 | |
| Download: ML20035E750 (5) | |
Text
--
~
MaineYankee AELLABLE ELECTRCTY FOR MAfNE SINCE 1972
$1"j** '"**'*
$'N"E e (207) 6224868 April 7, 1993 MN-93-38 CDF-93-58 UNITED STATES NUCLEAR REGULATORY COMMISSION Attention: Document Control Desk Washington, DC 20555
Reference:
(a)
License No. DPR-36 (Docket No. 50-309) i I
(b)
Letter, USNRC to Maine Yankee, " Statistical Combination of Uncertainties Methodology for Maine Yankee Operating Limits",
dated September 20, 1990.
i (c)
Letter, USNRC to Maine Yankee, " Topical Report YAEC-1752, Space and Time Analysis of Reactors (STAR) Computer Code", dated December 9, 1992.
l (d)
Letter, USNRC to Vermont Yankee, " Safety Evaluation of FROSSTE(-
2 Computer Code", dated September 24, 1992.
Subject:
Proposed Technical Specification Change No.179 - Administrative Changes l
and Clarifications to Technical Specifications Gentlemen:
Maine Yankee hereby submits, pursuant to 10CFR50.90, this application to amend the Technical Specifications to our operating license.
The changes proposed with this letter are administrative in nature and are intended to improve the Technical 1
Specifications.
Specifically, we propose changes to the composition of the Plant Operation Review Committee to reflect Maine Yankee organizational changes and incorporation of additional NRC approved methodologies (References (b), (c), and (d))
into the listing of analytical methods used in determining the core operating limits.
Maine Yankee has evaluated the proposed changes and has determined that they do not: involve a significant increase in the probability or consequences of an accident previously evaluated; create the possibility of a new or different kind of accident from any accident previously evaluated; or involve a significant reduction in a margin of safety.
Therefore, this proposed change does not involve a significant i
hazards consideration as defined in 10CFR50.92.
The evaluation is included in Attachment A.
The changes proposed with this letter are described in Attachment B to this letter.
Proposed revised Technical Specification pages are provided in Attachment C to this letter, with changes indicated by change bars in the left hand margin of each page.
190024 pi '
9304190200 930407 l
i t Li\\SMme PDR ADOCK 05000309 P
1 MaineYankee UNITEDSTATESNUCLEARREGULATORYCOMMISSION m-93-38 Attention: Document Control Desk Page 2 The proposed changes have been reviewed by the Plant Operation Review Committee and the Nuclear Safety Audit and Review Committee.
The Plant Operation Revww Committee has concluded that the proposed Technical Specification changes do not l
constitute an unreviewed safety question.
The State of Maine is being notified of this proposed change by copy of this letter.
Very truly.yours,
/.pp/
?
e Charles D. Frizzle President and Chief Executive Officer CDF/ jag Attachment A:
Significant Hazards Evaluation Attachment B:
Summary Descriptior, of the Proposed Technical Specification Changes Attachment C:
Proposed Technical Specification Changes c:
Mr. Themas T. Martin Mr. E. H. Trottier Mr. Charles S. Marschall Mr. Clough Toppan Mr. Patrick J. Dostie Mr. Uldis Vanags STATE OF MAINE Then personally appeared before me, Charles D. Frizzle, who being duly sworn did i
state that he is President and Chief Executive Officer of Maine Yankee Atomic Power Company, that he is duly authorized to execute and file the foregoing submittal in the name and on behalf of Maine Yankee Atomic Power Company, and that the statements therein are true to the best of his knowledge and b lief.
kW E+L lj ary Public BARBAR J.PADAVANA ks h20,1X4 WYCo
- o L \\93mn\\9338
i k
4 t
i Attachment A Sionificant Hazards Evaluation -
i l
4 l
l I
I i
l l
Li\\s3=n\\933s
i l
Sianificant Hazards Evaluation 1
l l
Cescription of Chances The changes proposed with this application to amend the Technical Specifications are administrative in nature and are design to both incorporate modif~ cations in the composition of the Plant Operation Review Committee (PORC), as reflecting current plant management, and include additional NRC approved references for use in determining the core operating limits.
I With respect to the composition of PORC, Maine Yankee proposes the following changes:
increase the membership to include the
- Managers, Plant Engineering and Planning / Scheduling; modify requirements to ensure that a quorum will continue to be a majority of members, and; update corrections to the titles of certain PORC members.
With respect to the inclusion of additional NRC approved references in the generation of the Core Operating Limits Report, Maine Yankee proposes to include the use of j
methodologies defining the statistical combination of uncertainties (SCU), space-time reactor kinetics (STAR), and fuel performance (FR0SSTEY-2).
i The proposed changes involve no physical alteration of the plant or changes to setpoints, operating conditions, or operating parameters.
Sionificant Hazards Evaluation The proposed changes to the Technical Specifications have been evaluated against the l
l standards of 10CFR50.92 and have been determined to not involve a significant hazards consideration. The proposed changes do not:
1.
Involve a significant increase in the probability or consequences of an accident l
previously evaluated.
Because these proposed changes do not involve any alterations to the plant.
changes to setpoints or operating conditions or operating parameters, the response of the plant to previously evaluated accidents is not affected.
l l
Therefore, the proposed Technical Specifications will not increase the probability or cons-quences of an accident previously evaluated.
2.
Create the possibility of a new or different kind of accident from any accident j
previously evaluated.
The administrative nature of the proposed changes do not affect the design, operation, maintenance, or testing of the plant. Thus, no new modes of failure are created. Therefore, these changes do not create the possibility of a new or different kind of accident from any accident previously evaluated.
u\\ssenissas l
3.
Involve a significant reduction in a margin of safety.
The proposed changes reflect an organizational change that does not modify the qualification requirements or competence of the members of the PORC.
The addition of the Manager, Planning and Scheduling and the Manager, Plant 1
Engineering to PORC membership expands the capability to more completely cover appropriate aspects of station operation. Thus, the capability of PORC to meet its responsibilities is not diminished. In response to the increase in the PORC membership, a corresponding increase in the requirements for a PORC quorum is t
proposed. This ensures that the PORC quorum will continue to be a majority of i
the PORC members.
The addition of NRC approved methodologies to the listing utilized in determining the core operating limits does not change the requirement that limits be determined such that all conditions of the safety analysis be met and, thus, does not represent a reduction in a margin of safety. Therefore, these changes do not involve a significant reduction in a margin to safety.
Maine Yankee has concluded that these proposed changes to the Technical Specifications do not involve a significant haztrds consideration as defined by 10CFR59.92.
i i
Li\\93mn\\9338