ML20128H904
| ML20128H904 | |
| Person / Time | |
|---|---|
| Site: | Haddam Neck, 05000000 |
| Issue date: | 07/01/1985 |
| From: | Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML20128H864 | List: |
| References | |
| TASK-3.D.3.4, TASK-TM NUDOCS 8507100303 | |
| Download: ML20128H904 (3) | |
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SAFETY EVALUATION BY THE OFFICE OF NUCLEAR REACTOR REGULATION SUPPORTING AMENDMENT N0.63 TO FACILITY OPERATING LICENSE NO. DPR-61 CONNECTICUT YANKEE ATOMIC P0llFD COMPANY HADDAM NECK PLANT DOCKET NO. 50-213
1.0 INTRODUCTION
By letter dated November 7,1984, the Connecticut Yankee Power Company (CYAPCO, the licensee) requested a license amendment that would modify the December 1984 completion date for Item III.D.3.4, Control Room Habitability, specified in the Commission's March 14, 1983 Order Confirming Licensee Commitments on Post-TMI Related Issues.
The proposed change would (1) remove the required completion date of December 1984, (2) replace the completion date with "To Be Determined," and (3) indicate that Item III.D.3.4 is no longer considered part of the Confirmatory Order. The completion date for the modifications will be developed in conjunction with the Integrated Safety Assessment Progran (ISAP) which is scheduled to be completed by November 1986 for the Haddam Neck Plant.
A Notice of Consideration of Issuance of Amendment to License and Proposed No Significant Hazards Consideration Determination and Opportunity for Hearing related to the requested action was published in the Federal Reoister on December 4, 1984 (49 FR 47463). No request for hearing or comments were received.
2.0 BACKGPOUND By letter dated December 28, 1983, CYAPC0 proposed that the NRC grant deferral of several NRC-required modifications for the purpose of expanding the integrated assessment conducted under the Systematic Evaluation Program (SEP) which would address outstanding regulatory requirements and plant improvements that were not originally within the scope of the SEP. The results of this evaluation would serve as the principal basis for an integrated implementation schedule.
One of the specific projects for which deferral was requested was NUREG-0737 (Clarification of TMI Action Plan Requirements) Item III.D.3.4 Control Room Habitability. The licensee's December ?8, 1983 submittal provided a basis for requesting deferral of the implementation of modifications associated with Item III.D.3.4 and provided justification for continued operation in the interim.
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. By letter dated April 5,1984, and on the basis of the evaluation presented below, the NRC staff concluded that deferral of the Control Room Habitability modifications for the 1024 fueling outages with a corresponding one cycle delay in the overall completion schedule were justified and acceptable. The staff aisc informed CYAPC0 that a request for a license amendment to nodify +be March 14, 1983 Confirmatory Order would be required.
3.0 EVALUATION The TMI Action Plan, HUREG-0737. Item III.D.3.4, requires that control room operators be adeouately protected against the accidental release of toxic and radioactive gases to ensure that the plant can be safely operated and shut down under such design basis conditions.
The licensee evaluated Haddam Neck against the applicable criteria defined for this issue. As result of that review, the licensee concluded that Haddam Neck would need new, redundant ventilation and filtration systems for the control room. The licensee committed to install these new systems by December 31, 1984 The licensee has completed preliminary desion work and ordered the na,ior
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components for these systems.
However, the licensee indicates that space limitations in the vicinity of the control room and the design requirements for a halon fire suppression system for the control room will require substantial additional resources. Moreover, ongoing evaluations related to ventilation issues from SEP will likely affect the design conditions for this system and, therefore, exacerbate the resource burden for this issue.
The licensee presents that these new systems would not otherwise be needed except for the conservative nature of the reevaluation criteria, particularly, the source term and meteorological conditions.
The licensee's calculations have shown that without the control room habitability modifications, control room personnel exposure would be less than 5 rem whole body dose. Additionally, thyroid exposures would be less than the 30 rem criterion, if operators remain on self-contained breathing apparatus, when reovired.
The staff notes that as a result of the review of NUREG-0737 Item III.D.3.4, CYAPC0 provided additional self-contained breathing apparatus for the control room operators in accordance with staf#
criteria. Thus, there is assurance that adequate breathing air supplies are evailable to maintain operator exposures within NRC guidelines.
The licensee has shown that onsite toxic substances do not pose a hazard to control room personnel. Therefore, no modifications were planned to protect against toxic chemicals.
Based upon the above, the licensee hes concluded that: (1) the control room operators can be adequately protected opefrst the effects of radioactive and toxic gases by maintaining doses within the guidelines of 10 CFR Part 50 Appendix A, General Design Criterion 19, and the plant can be safely shut down from the control renn under accident conditions; and (2) deferral of installation of upgraded control room habitability systems will have no impact on existing safety analyses.
, The licensee also proposas that the completine date for the modificatio developed in con,1 unction with the ISAP, which is scheduled to be November 1986 for the Haddam Neck Plant.
schedule" will be developed which will be incorporated into th an amendment.
If during the course of the review the staff determines that a no*e expaditious schedule is needed for a particular item, the schedule will be appropriately modified.
The staff has reviewed the bases for deferrel of the control roon modifications provided in the November 7,1984 lett (1) remove the required completion date of December 1984
, (2) replace the completion date with "To Be Determined," and (3) indicate that Item III.D.3.4 is no longer censidered part of the Confinnatory Order, is acceptable.
completion date in conjunction with the ISAP for any planne modifications to the control room ventilation systens is acceptable.
d.0 fMVIp0f:itENTAL CONSIDERATION This amendment involves a change in the installation or use of facility componerts located within the restricted area as defined in 10 CFR Part 20.
The staff has determined that the amendment involves no significant incre in the amounts, and ne significant change in the types, of any effluents that may be released offsite and that there is no significant increase in individual or cumu1 tive occupational radiation exposure.
7 has previously issued a-proposed finding that this a'mendment involves no The Commission significant hazards considerrtion and there has been no public comnent on such finding.
for categorical exclusion set forth in 10 CFR 51.22(c)(9).Acc 10 CFP 51.22(b) no environmental innect statement or environne Pursuant to assessment need be prepared in connection with the issuance of this anendnent.
5.0 CONCLUSION
The staff has concluded, based on the considerations discussed above, th (1) there is reasonable assurance that the health and safet will not be endangered by operation in the proposed manner,y of the public and the issuance of this amendment will not be inimice and I?1 such de#ense and security or to the health and safety of the public.
F.p ACVNOWLEDGMENT This safety evaluation was prepared by F. Akstulewicz.
Dated: July 1,1985