ML20003C166

Advises That Revised Design Criteria Mod of Reactor Bldg Penetration 401 Acceptable.Approved Criteria Encl

ML20003C166
Person / Time
Site:	Crane
Issue date:	02/11/1981
From:	Barrett L Office of Nuclear Reactor Regulation
To:	Hovey G METROPOLITAN EDISON CO.
References
CON-NRC-TMI-81-009, CON-NRC-TMI-81-9 NUDOCS 8102260734
Download: ML20003C166 (7)

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February 11, 1981 NRC/TMI-81-009 Docket No. 50-320 Mr. Gale K. Hovey, Vice President and Director of TMI-2 Metropolitan Edison Company P.O. Box 480 Middletown, PA 17057

Subject:

Design Criteria for Modification of Reactor Building Penetration #401

Reference:

Your letter of December 23, 1980, TLL 684 The referenced letter contained your original submittal of " Design Criteria for Closure of Reactor Building Penetration 401".

We have reviewed these criteria and requested several changes, additions and clarifications. They were discussed with your engineering and licensing staff and were incorporated into a revised submittal of the design criteria.

We have reviewed the revised design criteria and conclude that the criteria are acceptable for Modification of Reactor Building Penetration No. 401.

A copy of the revised criteria as approved is attached to prevent any possibility of confasion as to the approved version.

a Lake H. Barrett Acting Deputy Program Director TMI Program Office

Enclosure:

As Stated cc: See Service Distribution List iif4%

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Mr. Gale Hovey Metropolitan Edison Company FEB 11 1981 Mr. J. J. Barton Mr. Steven C. Sholly Manager, Site Operations, TMI-2 304 S. Market Street Metropolitan Edison Company Mechanicsburg, PA 17055 P. O. Box 480 Middletown, PA 17057 Mr. Thomas Gerusky Bureau of Radiation Protection Mr. E. D. Fuller P. O. Box 2063 TMI-2 Licensing Supervisor Harrisburg, PA 17120 Metropolitan Edison Company P. O. Box 480 Mr. Marvin I. Lewis Middletown, PA 17057 6504 Bradford Terrace Philadelphia, PA 19149 PWR Licensing Manager Ms. Jane Lee GPU Service Corporation R. D. 3, Box 3521 1001.nterpace Parkway Etters, PA 17319 Parsippany, NJ 07054 Walter W. Cohen, Consumer Advocate Mr. J. B. Libennan, Esquire Department of Justice Berlack, Israels, Liberman Strawberry Square,14th Floor 26 Broadway Harrisburg, PA 17127 New York, NY 10004 Robert L. Knupp, Esquire Assistant Solicitor Mr. G. F. Trowbridge, Esquire Shaw, Pittman, Potts & Trowbridge Knupp and Andrews

- 1800 M Street, N.W.

P. O. Box P Washington, DC 20036 407 it. Front Street

" 9' Dr. Walter H. Jordan 881 W. Outer Drive John E. Minnich, Chairperson Oak Ridge, TN 37830 D'auphin Co. Board of Commissioners Dauphin County Courthouse Dr. Linda W. Little Front and Market Streets 5000 Hermitage Drive Harrisburg, PA 17101 Raleigh, NC 27612 Robert Q. Pollard Karin W. Carter, Esquire Chesapeak Energy Alliance 505 Executive House 609 Montpelier Street P. O. Box 2357 Baltimore, MD 21218 Harrisburg, PA 17120 Chauncey Kepford Honorable. Mark Conen Judith H. Johnsrud 512 E-3 Main Capital Building Environmental Coalition on Nuclear Power

- Harrisburg, PA 17120 433 Orlando Avenue ae

ege, 16801 Ellyn Weiss, Esquire Sheldon, Harmon,.Roisman & Weiss 1725 I Street, N.W., Suite 506 Washington, DC 20006

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fir. Gale Hovey Metropolitan Edison Company 7EB 11 1981 Ms. Frieda Berryhill, Chairperson U. S. Environmental Protection Agency Coalition for Nuclear Power Plant Region III Office Postponement ATTN:

EIS Coordinator 2610 Grendon Drive Curtis Building (Sixth Floor)

Wilmington, DE 19808 6th and Walnut Streets Philadelphia, PA 19106 Holly S. Keck Anti-Nuclear Group Representing York Dauphin County Office Emergency 245 W. Philadelphia Stree' Preparedness York, PA 17404 Court House, Room 7 Front and Market Streets John Levin, Esquire Harrisburg, PA 17101 Pennsylvania Public Utilities Commission P. O. Box 3265 Department of Enviornmental Resources Harrisburg, PA 17120 ATTN:

Director, Office of Radiological Health' Jordon D. Cunningham, Esquire P. O. Box 2063 Fox, Farr and Cunningham Harrisburg, PA 17105 2320 N. Second Street Harrisburg, PA 17110 Governor's Office of State

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Ms. Kathy McCaughin ATTN:

Coordinator, Pennsylvania Three Mile Island Alert, Inc.

23 South 21st Street P. O. Bo 33 Harrisburg, PA 17104 Harrisburg, PA 17120 Ms. Marjorie M. Aamodt Mrs. Rhoda D. Carr 1402 Marene Drive R. D. #5 Coatesville, PA 19320 Harrisburg, PA 17109 Mr. Richard Roberts Ms. Karen Sheldon Sheldon, Harmon, Roisman & Weiss The Patriot

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1725 I Street, N.W., Suite 506 812 Market Street Washington, DC 20006 Harrisburg, PA 17105 Earl B. Hoffman Mr. Robert B. Borsum Dauphin County Commissioner Babcock & Wilcox Dauphin County Courthouse Nuclear Power Generation Division Front and Market Street Suite 420, 7735 Old Georgetown Road Harrisburg, PA,17101 Bethesda, MD 20014 Ivan W. Smith, Esquire Government Publications Section Atomic Safety and Licensing Board State of Library of Pennsylvania U. S. Nuclear Regulatory Commission Box 1601 Education Building Harrisburg, PA 17127 Washington, DC 20555 Atomic Safety and Licensing Board Panel Dr. Edward O. Swartz U. S. Nuclear Regulatory Commission Board of Supervisors Londonderry Township Washington, DC 20555 RFD #1 Geyers Church: Road

- Middletown, PA 17057 P

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. - Mr.. Gale Hovey Metropolitan Edison Company FEB 11 1981 i

Atomic Safety and Licensing Appeal Panel

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THREE MILE ISLAND UNIT #2 DESIGN CRITERIA MODIFICATION FOR CLOSURE OF REACTOR BUILDING PENETRATION 401 d

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THREE MILE ISLAND UNIT 2 DESIGN CRITERIA MODIFICATION FOR CLOSURE OF REACTOR BUILDING PENETRATION 401 1.0 SCOPE This document provides criteria for design modification to Reactor Building penetration number 401 to provide a more permanent closure of the penetration, in consideration of future potential increase of building water level to the extent of flooding the penetration.

2.0 INTRODUCTION

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Penetration 401 was modified in late Summer 1979 to allow access to obtain samples of the building sump water.

Following successful completion of the sampling program, f urther design changes were made to use the penetration f or building water level measurement, by addi-tion of a manometer system to the sampling tubing.

The penetration has remained in this basic configuration to date, to allow daily water level measurements. The present configuration is described by Reference 1 and Reference 2.

The intendeo modification will remove the 12-inch gate valve and the special cover assembly outboard of the valve.

A welded closure assembly will then be added. Provisions shall I

be made to obtain valid water level measurements at least once every 48

y hours during installation of the modification.

This modification is not intended to return the penetration design to the pre-accident con-dition nor to qualify the penetration for plant restart.

3.0 DESIGN REQUIREMENTS 3.1

' Codes and Standards 3.1.1 Design and fabrication shall be in accordance with appli-cable portions of ANSI B 31.7. --

Welding shall be in accordance with ASME a. tion IX.

3.1.2 3.2 Design Pressure and Temperature The penetration shall be designed for the positive pressure corresponding to the maximum allowable water level in the s/

Reactor Building, as well as 2.5 psi vacuum condition. Design temperature range shall be 500F to 1000F.

3.3 Design Loads Design shall consider dead weight and pressure loads, and ac-celerations applicable to the plant safe shutdown earthquake, I.

4 without loss of function.

4.0 MATERIALS New pressure boundary ferrous materials shall be in accordance with the requirements of ANSI B31.7, including identification, traceability, and certification of test results.

Tubing, fittings, and valves associated with the level measuring instrumentation shall be of commer-cial grade with certificates of conformance provided.

5.0 TESTING All new welds shall receive visual plus liquid penetration inspection.

s' Radiography of welds will not be performed.

6.0 QUALITY ASSURANCE Design, procurement, fabrication, and testing are within QA scope, as defined in applicable sections of "TMI-2 Recovery QA Plan".

7.0 REFERENCES

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7.1

' Drawing JS061780, Revision 0 - Three Mile Island Unit #2, Containn.ent Penetration No. 401, M20 area.

7.2.

Three Mile Island Unit #2 procedure 2104-4.47, Instrument Hookup, Measurement and Removal. for Reactor Building - Su=p Level Deter-minations.

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