ML17139D167
| ML17139D167 | |
| Person / Time | |
|---|---|
| Site: | Susquehanna  |
| Issue date: | 09/04/1985 |
| From: | Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML17139D166 | List: |
| References | |
| NUDOCS 8509090312 | |
| Download: ML17139D167 (4) | |
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NUCLEAR REGULATORY COMMISSION WASHINGTON, O. C. 20555 SAFETY EVALUATION AMENDMENT NO. 15 TO NPF-22 SUS UEHANNA STEAM ELECTRIC STATION, UNIT 2 DOCKET NO. 50-388 Introduction The licensee proposed changes to the Technical Specifications of the operating license for Susquehanna Steam Electric Station, Unit 2.
These changes are as a result of the licensee's submittal, final report on a deficiency involving water hammer in the Emergency Service Water (ESW) system dated September 22, 1983 (N.W. Curtis (PP&L) to T.E. Murley (NRC)).
On February 7, 1985, the NRC issued license amendments 30 and 6 to Units 1 and 2, respectively.
Contained in these amendments was the approval for installation of two 8-inch motor-operated butterfly valves (HV-08693 A and B) which were added to the Unit 1 reactor building in the ESW return lines from the control structure chillers.
Since these 8 inch butterfly valves are used in support of the common control structure chillers, they were included in both the Unit 1 and Unit 2 Technical Specifications.
Contained in the safety evaluation of amendments 30 and 6 is the statement that additional Unit 2 modifications have been submitted as a separate proposed amendment.
This amendment addresses the additional changes which are unique to Unit 2.
Evaluation The proposed modification consists of the installation of the two 4-inch motor-operated butterfly valves (HV-21144 A and B) in the ESW return lines from the direct-expansion (DX) units.
The installation of these valves will complete the plant modifications necessary to mitigate the ESW water hammer problem for Unit 2.
This modification is unique to Unit 2 as Unit 1 does not have DX units.
The valves to be installed in the ESW system have environmentally qualified limitorque motor operators.
The licensee has stated that the piping was analyzed for the addition of the valves and operators and was appropriately supported.
The installation of these valves will be in accordance with Section XI of the ASME Boiler Pressure Vessel Code.
The NRC staff finds these modifications acceptable as they support a corrective action requested by the staff and are in accordance with NRC regulations.
The
-staff has discussed with the licensee the licensee's intended methods of instal-lation and finds that since the licensee will be installing the valves in accordance with Section XI of the ASME Boiler and Pressure Vessel Code that this is an acceptable method to the staff as it meets NRC requirements.
The licensee has proposed to add these valves to Technical Specification Table 3.8.4.2-1, Motor-Operated Valves Thermal Overload Protection.
This addition to the Technical Specifications is acceptable as these new motor operated valves 8509O9O3li SSO9OO PDR,'DOCK 05000388 p ~-
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have a thermal overload protection capability and will be subject to the requirements of Table 3.8.4.2-1 of the Technical Specifications.
I Our review of the proposed change shows that the licensee's request is an improvement in safety as it reduces the likelihood of water hammer in the ESW system.
The staff therefore finds these changes acceptable.
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 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 Commission's regulations and the issuance of this amendment will not be inimical to the common defense and security or to the health and safety of the public.
Dated:
~KI 04 $85
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