ML19210A325
| ML19210A325 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 08/23/1978 |
| From: | Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML19210A319 | List: |
| References | |
| NUDOCS 7910290559 | |
| Download: ML19210A325 (2) | |
Text
j UNITED STATES 3"
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SAFETY EVALUATION BY THE OFFICE OF NUCLEAR REACTOR REGULATION SUPPORTING AMENDMENT NO. 43 TO FACILITY OPERATING LICENSE NO. DPR-50 METROPOLITAN EDISON COMPANY JERSEY CENTRAL POWER AND LIGHT COMPANY AND PENNSYLVANIA ELECTRIC COMPANY THREE MILE ISLAND NUCLEAR STATION, UNIT NO. 1 DOCKET NO. 50-289 Introducuon By letter dated January 27, 1978, as supplemented by letter dated July 17, 1978, Metropolitan Edison Company (Met Ed) requested amendment of Facility Operating License No. DPR-50 for Three Mile Island Nuclear Station, Unit No. 1 (TMI-1).
The requested change would revise the Technical Specifica-tions for TMI-l by increasing the volume requirements of the boric acid mix tank, the reclaimed boric acid storage tank, and the borated water storage tank.
Background
The current Technical Specifications require at least the equivalent of 550 cu. ft. of 8700 parts per million (ppm) boric acid solution in the boric acid mix tank or the reclaimed boric acid storage tank whenever the reactor is critical.
These volumes were calculated without considering the highest worth control rod assembly (CRA) stuck cut of the core, contrary to the Bases of Specification 3.2.
Recent investigation and analysis revealed that the volume requirement is insufficient to assure a 1% delta k/k shutdown margin for all zero power temperature conditions above cold shutdown at the worst time in core life with a stuck CRA and after xenon decay.
Discussion and Evaluation The proposed change would increase the minimum required volume of boric acid solution in the boric acid mix tank and the reclaimed horic acid storage tank from 550 to 800 cubic feet.
This change would provide 1488 18L 3 91 0 2eo s z rp
sufficient quantity of boric acid to assure a 1% delta k/k shutdown margin at cold shutdown at the worst time of core life with the highest worth CRA fully withdrawn and no credit for xenon.
Since the revised volume requirements include a consideration of the highest worth CRA stuck out of the core, we find the proposed change would resolve the deficiency in the current Technical Specifications, would not result in a decrease in the safety margin and is acceptable.
In addition to this change, the basis for the specification would be revised to reflect the corrected calculations by indicating a minimum required volume of 26,500 gallons of 2270 ppm boric acid solution in the borated water storage tank.
The volume presently stated in the basis is 16,000 gallons at a concentration of 2270 ppm.
This change does not involve a safety consideration since specification 3.3.1.1 requires a minimum of 350,000 gallons of water having a minimum concentration of 2270 ppm boron in the borated water Nage tank, which greatly exceeds both the current and proposed.viumes.
Environmental Consideration We have determined that the amendment does not authorize a change in effluent types or total amounts nor an increase in power level and will not result in any significant environmental impact.
Having made this determination, we have further concluded that the amendment involves an action which is insignificant from the standpoint of environmental impact and, pursuant to 10 CFR 551.5(d)(4), that an environmental impact statement, or negative declaration and environmental impact appraisal need not be prepared in connection with the issuance of this amendment.
Conclusion We have concluded, based on the considerations discussed above, that:
(1) because the amendment does not involve a significant increase in the probability or consequences of accidents previously considered and does not involve a significant decrease in a safety margin, the amendment does not involve a significant hazards consideration, (2) there is reasonable assurance that the health and safety of the public will not be endangered by operation in the proposed manner, and (3) such activities will be con-ductr.d in compliance with the Commission's regulations and tne issuance of this amendment will not be inimical to the common defense and security or to the health and safety of the public.
Dated: August 23, 1978 1488 185
7590-01 UNITED STATES flUCLEAR REGULATORY COBi"ICSIOl!
DOCKET T40. 50-289 METROPOLITAN EDIS0i! C0liPANY JERSEY CEl! TRAL POWER A!;D LIGHT COMPAtiY PENilSYLVANTA ELECTRIC C0!!PANY f;0TICE OF ISSUA?!CE OF AF'Ei:C"ENT TO FACILITY OPERATIr;5 LICENSE m
The U. S. Nuclear Regulatory Commission (the Commission) has issued Amendment No. 43 to Facility Operating License No. DPR-50, issued to Metropolitan Edison Company, Jersey Central Power and Light Company and Pennsylvania Electric Company (the licensees), which revised Technical Specifications for operation of the Three Mile Island fluclear Station, Unit No.1 (the facility) located in Dauphin County, Pennsylvsic.
The amendment is effective as of its date of issuance.
This amendment revises the Technical Specifications by increasing the volume requirements of the boric acid mix tank, the reclaimed boric 4
acid storage tank, and the borated water storage tank.
The application for the amendment complies with the standards ar.d requirements of the Atomic Energy Act of 1954, as amended (the Act),
and the Commission's rules and regulations.
The Commission has nade appropriate findings as required by the Act and the Commission's rulu and regulations in 10 CFR Chapter I, which are set forth in the licer e _
anr3ndment.
Prior public notice of this amendrnnt was not requirt.d s e..
the amendment docs not involve a significant hazards consideration.
1488 186 M W Ra0 ]
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7590-01
- The Commission has determined that the issuance of this amendment will not result in any significant environmental impact and that pursuant to 10 CFR 551.5(d)(4) an environmental impact statement, ce negative declaration and environmental impact appraisal need not be prepared in ::nnection with issuance of this amendment.
For furth r details with respect to this action, see (1) the application for amendment dated January 27, 1978 as supplemented by letter dated July 17,1978,(2) Amenda.ent No. 43 to License No. DPR-50, and (3) the Commission's related Safety Evaluation.
All of these items are available for public inspection at the Conmission's Public Document Room,1717 H Street, N.W., Washington, D. C and at the Government Publications Section, State Library of Pennsylvania, Box 1601 (Education Building),Harrisburg, Pennsylvania.
A copy of items (2) and (3) may be obtained upon request addressed to the U. S. fluclear Regulatory
, Commission, Washington, D. C.
20555, Attention:
Director, Division of Operating Reactors.
Dated at Bethesda, fiaryland, this 23rd day of August 1978.
FOR THE flUCLEAR REGU TORY C0f'1'ISSIO.'.
)
kh I Robert W. Reid, Chief Operating Reactors Branch '4 Division of Operating Reactors 1488 187 I
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