ML20247G413

Safety Evaluation Supporting Amend 34 to License DPR-73

ML20247G413
Person / Time
Site:	Three Mile Island
Issue date:	05/15/1989
From:	Office of Nuclear Reactor Regulation
To:
Shared Package
ML20247G391	List: ML20247G385 ML20247G397 ML20247G413
References
NUDOCS 8905300395
Download: ML20247G413 (4)

Text

{{#Wiki_filter:- _ _ _ __ _ e# [*% ~'%,, UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D. C. 20555 SAFETY EVALUATION BY THE OFFICE OF NUCLEAR REACTOR REGULATION  ! 4 RELATED TO AMENDMENT NO. 34 TO FACILITY OPERATING LICENSE NO. DPR-73

                                                                                                                                                     ]j GPU NUCLEAR CORPORATION THREE MILE ISLAND NUCLEAR STATION, UNIT NO. 2                   .

l DOCKET N0. 50-320 INTRODUCTION By letter dated December 4,1987, GPU Nuclear Cor) oration (GPUN or the licensee) requested the approval of a change to tie Appendix A Technical Specifications of Facility Operating License No. DPR-73 for Three Mile Island Nuclear Station, Unit No. 2. The proposed amendment would revise the specifications related to fire protection systems at TMI-2 by aligning license requirements with the current, as well future, plcnt conditions through the remainder of the current cleanup operations. DISCUSSION AND EVALUATION The licensee proposes a revised definition of " Fire Suppression Water System " Section L13. The current definition describes the components of the fire suppression water system. The revised definition deletes the term: )

                                                        " sprinkler" and " spray system riser." These systems are eliminated consistent with the deletion of Section 3.7.10.2 which requires an operable deluge / sprinkler system at a number of locations. The staff finds the licensees proposal to delete the terms " sprinkler" and " spray system" from Section 1.13 acceptable.                                                                      ;

Technical Specification 3.7.10.1, Fire Suppression Vater System, lists the components of the fire suppression water system that shall be operable. The current technical specification requires four high pressure pumps, a Unit 2 river water intake diesel fire pump, Unit 2 river water intake structure, and an operable flow path to each sprinkler and spray system riser as well as a number of other components to be operable. The licensee proposes to change ; the technical specification to require only three high pressure pumps, and delete the requirements for an operable Unit 2 river water intake diesel fire pump, an operable intake structure, and an operable flow path to each sprinkler and spray system riser. The staff finds that only two of the currently required four fire pumps are necessary to provide the required flowrate of 3575 gpm for the TMI site. Additionally, the staff finds that

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SAFETY EVALUATION BY THE OFFICE OF NUCLEAR REACTOR REGULATION RELATED TO AMENDMENT NO. 34 TO FACILITY OPERATING LICENSE NO. DPR-73 GPU NHCLEAP. CORPORATION THREE MILE ISLAND NUCLEAR STATION, UNIT NO. 2 I DOCKET NO. S0-320 INTRODUCTION By letter dated December 4,1987, GPU Nuclear Corporation (GPUN or the licensee) requested the approval of a change to the Appendix A Technical Specifications of Facility Operating License No. DPR-73 for Three Mile Island Nuclear Station, Unit No. 2. The proposed amendment would revise the specifications related to fire protection systems at TMI-2 by aligning license requirements with the current, as well future, plant conditions through the remainder of the current cleanup operations. DISCUSSION AND EYALUATION The licensee proposes a revised definition of " Fire Suppression Water System," Section 1.13. The current definition describes the components of the fire suppression water system. The revised definition deletes the terms

                        " sprinkler" and " spray system riser." These systems are eliminated consistent with the deletion of Section 3.7.10.2 which requires an operable deluge / sprinkler system at a number of locations. The staff finds the licensees proposal to delete the terms " sprinkler" and " spray system" from Sectico 1.13 acceptable.

Technical Specification 3.7.10.1, F1.e Suppression Vater System, lists the , { components of the fire suppression water system that shall be operable. The { current technical specification requires four high pressure pumps, a Unit 2 1 river water intake diesel fire pump, Unit 2 river water intake str,.. ture, and 1 an operable flow path to each sprinkler and spray syster. riser as well as a 1 number of other components to be operable. The licensee proposes to change i the technical specification to require only three high pressure pumps, and 1 delete the requirements for an operable Unit 2 river water intake diesel fire pump, an operable intake structure, and an operable flow path to each sprinkler and spray system riser. The staff finds that only two of the currently required four fire pumps are necessary to provide the required flowrate of 3575 gpm for the TMI site. Additionally, the staff finds that l l l S -_mm____ _ . _ _ _ _ _ _ _ _ _ . _ _ _ . _ _ ._ _ . _ _ _ _ _.

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s l: only two of the current four fire protection water supplies for the TMI site are required. Furthermore, firo suppression capability is principally required to attain safe shutdown of the facility and preclude the release of. radioactivity. The current THI-2 core conditions and the level of combustible loading inside the containment warrant a reduction in fire suppression capability. 'The staff finds the licensee's proposed change acceptable and L consistent with current staff practice. Technical Specification 3.7.10.2, Deluge / Sprinkler Systems, requires operable deluge and/or sprinkler. systems located in a number of locations throughout THI-2. The licensee proposes to delete the requirement for maintaining the . operability of these systems. The principal purpose of the deluge / sprinkler 1 systems is to assure the safe shutdown of.the frility, and preclude the

                  . possibility of an off-site, release in excess of 10 CFR Part 100 limits. Since safe-shutdown of the facility has been attained and assured, and the charcoal filters in the TMI-2 ventilation systems are no longer necessary to maintain     -

i off-site doses less than 10 CFR Part 100 limits, the staff finds the proposed changes acceptable. Technical Specification 3.7.11, Penetration Fire Barriers, requires that all penetration fire barriers protecting safety related areas be in place and capable of functioning as designed. The licensee has requested to delete the

                  . requirement to maintain functional penetration fire barriers. 'The reactor
                 - building penetration seals and access hatches were not fire rated; hence the requirement for penetration fire berriers. The integrity of these seals and

access hatches'is not required for the safe shutdown of the plant.

Penetration fire barriers are also not needed to preclude off-site releases

                  ' greater than.10 CFR Part 100 limit. The' limited size of the design basis fire, the degree of the resulting overpressure inside the reactor building, and the nature and locatfon of contamination inside the reactor building does not require functioning penetration fire barriers to maintain off-site releases within acceptable limits. The staff finds the proposed changes acceptable.

Section 3/4.7.11, Penetration Fire Barriers, provides the basis for requiring the functional integrity of the Fire Barrier Penetration Seals. The licensee proposes to delete Bases Section 3/4.7.11 consistent with the request to delete Section 3.7.11, Penetration Fire Barriers. The staff has determined above that the elimination of the requirement to maintain the functional integrity of the fire barriers is appropriate; therefore, deletion of this Section is consistent with the staff's determination.

                 ., ENVIRONMENTAL CONSIDERATION This amendment changes a requirement with respect to installation or use of a facility component located within the restricted areas as defined in 10 CFR Fart 20. The staff has determined that the amendment involves no significant increar.e in the amounts and no significant change in the types of any effluents that may be released off site, and that there is no significant increase in
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  ;;;                                                                                                       individual or cumulative occupational exposure. The staff has determined that the amendment involves no significant hazards consideration, and there has been no public comment on such finding. Accordingly, the amendment meets the eligibility' criteria for categorical exclusion set forth in 10 CFR 51.22(c)(9). Pursuantto10CFR51.22(b),noenvironmentalim)actstatement L                                or environmental assessment need be prepared in connection wit 1 the issuance of this amendment.-

l CONCLUSION 11 ' ~ 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 p be conducted in compliance with the Commission's regulations, and (3) the - issuance of this amendment will not be inimical to the common defense and security or to the health and safety of the public.

                             ' Principal Contributor: Michael T. Hasnik Dated:            May 15, 1989 i

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