ML20077G521
| ML20077G521 | |
| Person / Time | |
|---|---|
| Site: | Summer  |
| Issue date: | 06/19/1991 |
| From: | Anthony Mendiola Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML20077G523 | List: |
| References | |
| NUDOCS 9107010127 | |
| Download: ML20077G521 (5) | |
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UNITED STATES 8
NUCLEAR REGULATORY COMMISSION
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SOUTH CAROLINA ELECTRIC A GAS COMPANY SOUTH CAROLINA PUBLIC SERVICE AUTHORITY DOCKET NO. 50-395 VIRGIL C. SUMMER NUCLEAR STATION, UNIT NO. 1 AMENDMENT TO FACILITY OPERATING LICENSE Amendment No.100 License No. NPF-12 1.
The Nuclear Regulatory Conunission (the Conmission) has found that:
A.
The application for amendment by South Carolina Electric & Gas Company (the licensee), dated February 4,1991, complies with the standards and requirements of the Atomic Energy Act of 1954, as amended (the Act), and the Congnission's rules and regulations set forth in 10 CFR Chapter I; B.
The facility will operate in conformity with the application, the provisions of the Act, and the rules and regulations of the Commission; C.
There is reasonable assurance (1) that the activities authorized by this amendment can be conducted without endangering the health and safety of the public, and (ii) that such activities will be conducted in compliance with the Commission's regulations; D.
The issuance of this amenoment will not be inimical to the common defense and security or to the health and safety of the public; and E.
The issuance of this amendment is in accordance with 10 CFR Part 51 of the Conrnission's regulations and all applicable requirements have been satisfied.
2.
Accordingly, the license is amended by changes to the Technical Specifications, as indicated in the attachment to this license amendment; and paragraph 2.C.(2) of facility Operating License No. NPF-12 is hereby amended to read as follows:
9107010127 910619 PDR ADOCK 05000395 P
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2 (2) Technical Specifications and Environmental Protection Plan The Technical Specifications contained in Appendix A, as revised through Amendnent No. 100, and the Environmental Protection Plan contained in Appendix B, are hereby incorporated in the license.
South Carolina Electric & Gas Company shall operate the f acility in accordance with the Technical Specifications and the Environmental Protection Plan.
3.
This amendment is effective as of its date of issuance and shall be implemented within 30 days of issuance.
FOR THE NUCLEAR REGULATORY COMMISSION Original Sianed By:
Anthony J. Hendiola, Acting Director Project Directorate 11-1 Division of Reactor Projects 1/11 Office of Nuclear Reactor Regulation
Attachment:
Changes to the Technical Specifications Date of Issuance: June 19, 1991 l
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DATE 6 /3c/91
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SUMMER AMEND 79683
i ATTACHMENT TO LICENSE AMENDMENT NO.100 TO FACILITY OPERATING LICENSE NO. NPF-12 DOCKET NO. 50-395 Replace the following pages of the Appendix A Technical Spec 1fications with the enclosed pages.
The revised pages are indicated by marginal lines.
t Remove Paoes Insert Pages 3/4 1-3a 3/4 1 3a B 3/4 2-2 B 3/4 2-2 t
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FIGURE 3.1-3 REQUIRED SHUTDOWN MARGIN (MODES 3,4, ANO 5) 7 65 6
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l POWER DISTRIBUTION LIMIT BASES AXIAL FLUX DIFFERENCE (Continued)
ND At power levels below APL
, the limits on AFD are defined in the COLR consistent with the Relaxed Axial Offset Control (RA00) operating procedure and limits.
These limits were calculated in a manner such that expected operational transients, e.g., load follow operations, would not result in the AFD deviating outside of those limits.
However, in the event such a deviation occurs, the short period of time allowed outside of the limits at reduced power levels will not result in significant xenon redistribution such that the envelope of peaking factors would change sufficiently to prevent operation in ND the vicinity of the APL power level.
NU At power levels greater than APL
, two modes of operation are permissible; (1) RA00, the AFD limit of which are defined in the COLR and (2) Base 8,oad operation, which is defined as the maintenance of the AFD within COLR specifica-l ND tions band about a target value.
The RA00 oprating procedure above APL 4,
ND the same as that defined for operation below APL However, it is possible when following extended load following mans" vers that the AFD limits may result in restrictions in the maximum allowed powe or AFD in order to guarantee operation with F (z) less than its limiting value.
To allow ope.ation at the q
maximum permissible power level the Base load operating procedure restricts the indicated AFD to relatively small target band (as specified in the COLR) and power swings (APLND < power < APLOL or 100% Rated Thermal Power, whichever !s lower).
For Base Load operation, it is expected that the plant will operate within the target bano.
Operation outside of the target hand for the short time period allowed will not result in significant xenon redistribution such that the envelope of peaking factors would change sufficiently to prohibit continued operation in the power region defined above.
To assure there is no residual xenon redistribution impact from past operation on the Base load ND operation, a 24-hour waiting period at a power level above APL and allowed by RAOC is necessary.
During this time period load changes and rod motion are restricted to that allowed by the Base Load procedure.
After the waiting period extended Base Load operation is permissible.
The computer determines the one minute average of each of the OPERABLE excore detector outputs and provides an alarm message immediately if the AFD for at least 2 of 4 or 2 of 3 OPERABLE excore channels are:
(1) outside the allowed delta-1 power operating space (for RAOC operation), or (2) outside the allowed delta-! target band (for Base Load operation).
These alarms are active when power is greater than:
(1) 50% of RATED THERMAL POWER (for RAOC operation), or (2) APLND (for Base Load operation).
Penalty deviation minutes i
for Base Load operation are not accumulated based on the short oriod of time during which operation outside of the target band is allowed.
SUMMER - UNIT 1 B 3/4 2-2 Amen hent No. 75, 88, 100
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