ML17156A223
| ML17156A223 | |
| Person / Time | |
|---|---|
| Site: | Susquehanna  |
| Issue date: | 04/30/1985 |
| From: | NRC |
| To: | |
| Shared Package | |
| ML17156A221 | List: |
| References | |
| NUDOCS 8505090519 | |
| Download: ML17156A223 (4) | |
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t UNITED STATES t
NUCLEAR REGULATORY COMM(SSION WASHINGTON, D. C. 20555 SAFETY EVALUATION AMENDMENT NO. z TO NPF-14 SUSQUEHANNA STEAM ELECTRIC STATI N, UNIT 1 DOCKET NO. 50-387 Introduction Pennsylvania Power and Light Company'has requested (N.
W. Curtis (PP8L) to A. Schwencer (NRC) dated October 30, 1984 as supplemented on February 20, 1985) deletion of license condition 2.C.(4)(b) which reads as follows:
"Prior to startup following the first refueling outage, PP&L shall provide, for NRC review and approval, a
new stability analysis, indicating the results for appropriate exposure core conditions."
Subsequent to the imposition of this license condition PPEL has implemented new technical specifications for Susquehanna Units 1 and 2 which provide procedures for detecting and suppressing power oscillations induced by a thermal hydraulic instability.
Evaluation The staff finds that the intent of this license condition has been satisfied.
The staff has based its finding on the fact that License Condition 2.C.(4)(b) is more restrictive than GDC 12 in that it does not include the option to detect and suppress power oscillations.
In the Code of Federal Regulations (10 CFR 50 Appendix A), General Design Criteria (GDC) 12, "Suppression of Reactor Power Oscillations," states:
The reactor core and associated coolant, control, and protection systems shall be designed to assure that power oscillations which can result in conditions exceeding specified acceptable fuel design limits are not possible or can be reliably and readily detected and suppressed.
With the approval of Technical Specifications implementing the guidance of General Electric Service Information Letter No.
380 (GE-SIL-380), Revision 1, the licensee's procedures for detecting and suppressing power oscillations at SSFS Units 1 and 2 were implemented on October 9, 1984.
Our October 9, 1984, safety evaluation accompanying Amendment No.
24 to the Unit 1 and Amendment No.
2 to the Unit 2 licenses, states that the changes proposed in the licensee's May 15, 1984, letter on the subject of BWR Core Thermal Hydraulic Stability "were prudent and acceptably resolve... our concerns...assuming long term single loop operation is not permitted."
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I' 1n summary, the NRC staff, having previously reviewed and approved these changes to the technical specifications, finds that, together with PPSL's original stability
- analysis, they give adequate assurance that GDC 12 is satisfied.
Therefore, no new stability analysis is required for Cycle 2 and the Unit 1 license condition 2.C.(4)(b) may be deleted from the license.
Environmental Consideration This amendment involves a change in the installation or use of a facility component located within the restricted area as defined in 10 CFR Part 20.
The staff has determined that the amendment 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 consideration and there has been no public comment on such finding.
Accordingly, this 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.
Conclusion We have 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, and (2) such activities will be conducted in compliance with the Coranission's regulations and the issuance of this amendment will not be inimical to the common defense and security or to the health and safety o
the public.
Dated: A!R h
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