ML14183A198
| ML14183A198 | |
| Person / Time | |
|---|---|
| Site: | Robinson  |
| Issue date: | 05/17/1991 |
| From: | Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML14183A197 | List: |
| References | |
| NUDOCS 9105280101 | |
| Download: ML14183A198 (3) | |
Text
- AR REG(,
0 UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D. C. 20555 SAFETY EVALUATION BY THE OFFICE OF NUCLEAR REACTOR REGULATION RELATED TO AMENDMENT NO. 134 TO FACILITY OPERATING LICENSE NO. DPR-23 CAROLINA POWER & LIGHT COMPANY H. B. ROBINSON STEAM ELECTRIC PLANT, UNIT NO. 2 DOCKET NO. 50-261
1.0 INTRODUCTION
By letter dated August 29, 1990, the licensee of H. B. Robinson Steam Electric Plant, Unit No. 2, Carolina Power & Light Company, requested revision to technical specification (TS) sections 3.15 and 4.15. The content of these sections encompasses the air cleaning systems operability and surveillance requirements. They are being modified to reflect modifications to the existing air cleaning system. The revision ot the licensee's original design proposal; submitted on June 2 and November 4, 1983, was provided in a letter dated July 26,.1988. This was followed by the basis and results of the dose calculations in a May 21, 1990, letter and further revisions to the design in a August 29, 1990, submittal. The final design and commitments were accepted by the NRC in a safety evaluation report (SER) dated October 26, 1990.
Additionally, due to the extensive nature of the control room habitability modifications, the licensee is requesting a period of time, up to 6 months, subsequent to Refueling No. 13 to complete system check out, performance verification, and system optimization. During this period, these actions could require a redundant train or redundant components to be out of service for periods longer than allowed by the proposed TS. For this reason, the licensee is requesting that a transition from the old to the new TS be granted for the duration of this check out period. The intent of the licensee during this period will be to assure that at least one component train will be available to mitigate the consequences of an accident. This train will be required to meet the requirements of the existing TS including action statements.and surveillance requirements. The new TS would be implemented following completion of the testing/optimization period. The licensee is therefore requesting that the amendment be issued with an implementation date of no later than six months after the date of synchronization to the grid following Refueling No. 13.
2.0 EVALUA1LON Design changes to the plant are required as a result of evaluations that were conducted in accordance with the requirements of NUREG-0737, Item III.D.3.4, Control Room Habitability. The evaluations identified the need to make improvements to reduce the dose that operators could receive in a design basis accident and to improve reliability by assuring that a failure of any active component of the control room HVAC system would not result in system inoperability. The reliability of the control room HVAC system to perform its 9105290101 910517 PDR ADOCK 05000261 P _
_PDR 1j
-2 safety function is accomplished in the approved design by providing fully redundant safety-related active components.. The system is designed to remain operable following a single active failure concurrent with an initiating event.
The bulk of the changes to the TS are a result of this addition of redundant safety-related active components and of the required operability following a single active failure concurrent with an initiating event. The staff has reviewed the revised sections of the TS and finds them acceptable.
The licensee has requested that up to 6 months subsequent to Refueling No. 13 be allowed for system check out, performance verification and system optimization. The licensee will assure that during this period at least one component train will be available to mitigate the consequences of an accident.
This train will be required to meet the requirements of the existing TS including action statements and surveillance requirements. This request does not represent a degradation of the current systems ability to mitigate the consequences of an accident and is acceptable to the staff.
In the SER dated October 26, 1990, the licensee was required to address two
- issues in the new TS. The first commitment required the licensee to establish procedures to provide for periodic inspection of the gravity dampers to verify that they are unimpeded and are able to fully open or close when required.
The second commitment requires that the laboratory test of a representative sample of the carbon adsorbent should demonstrate a methyl iodide removal efficiency of greater than or equal to 99 percent. The staff has reviewed the new TS and finds that these commitments have been integrated and are acceptable.
Based on the above evaluation of the licensee's submittal, the staff finds the revised TS Sections 3.15 and 4.15, Control Room Air Conditioning System, to be acceptable. The staff also finds the requested six month time period for testing and optimization following Refueling No. 13 to allow transition from the old to the new TS to be acceptable.
3.0 State Consultation In accordance with the Commission's regulations, the South Carolina State official was notified of the proposed issuance of the amendment. The state official had no comments.
4.0 ENVIRONMENTAL CONSIDERATION
This amendment changes a requirement with respect to installation or use of a facility component located within the restricted area as defined in 10 CFR Part 20 and changes the surveillance requirements. The NRC staff has determined that the ameadment involves-no significant increase in the amounts, and no significant change in the types, of any effluents that may be released offsite, and that there is no significant increase in individual or cumulative occupational radiation exposure. The Commission has previously issued a proposed finding that this amendment involves no significant hazards
-3 consideration, and there has been no public comment on such finding (55 FR 30293), Accordingly, the amendment meets the eligibility criteria for categorical exclusion set forth in 10 CFR 51.22(c)(9).
Pursuant to 10 CFR 51.22(b) no environmental impact statement or environmental assessment need be prepared in connection with the issuance of this amendment.
5.0 CONCLUSION
The Commission has concluded, based on the considerations discussed above, that: (1) there is reasonable assurance that the health and safety of the public will not be endangered by operation in the proposed manner, (2) such activities will be conducted in compliance with the Commission's regulations, and (3) the issuance of the amendment will not be inimical to the common defense and security or to the health and safety of the public.
Principal Contributor: W. Pegg Date: May 17, 1991