ML20203G324

Forwards Request for Addl Info Re Erosion of Cement from Underlying Porous Concrete Drainage Sys at Millstone Unit 3

ML20203G324
Person / Time
Site:	Millstone
Issue date:	02/24/1998
From:	Andersen J NRC (Affiliation Not Assigned)
To:	Bowling M NORTHEAST NUCLEAR ENERGY CO.
References
TAC-M96402, NUDOCS 9803020277
Download: ML20203G324 (5)

Text

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- Mr. M rtin L. Bowling February 24, 1998 .

Recov ry Officer - Millstone

! r Unit No. 2  %' -

Northeast Nuclear Energy Company l clo Ms. Patricia A. Loftus Director- Regulatory Affairs P. O. Box 128 Waterford, CT 06385

SUBJECT:

REQUEST FOR ADCITIONAL INFORMATION REGARDING EROSION OF CEMENT FROM POrtOUS CONCRETE SUBFOUNDATION (TAC NO. M96402)

Dear Mr. Bowling:

By letter dated December 19,1997, Northeast Nuclear Energy Company (the licensee) submitted additionaiinformation regarding the erosiori of cement from the underlyin0 porous concrete drainaoe system at Millstone Unit 3. In ac:Jition, as part of the Millstone Restart .

Assessment Plan Significant item List #12 review, the staff reviewed the licensee's safety evaluation," Containment Structure Porous Concrete Drainage System." Based on a review of the De: ember 19,1997, letter, anct the above mentioned safety evalaution, the NRC requests additiontiinformation related to this topin Yot' are requested to provide the NRC with answers

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to the encosed questions. Please respond to this request for additionalinformation expeditious!y in order for the staff to complete its review prior to Mode 2 operations.

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I Sincerely, origimi signed by: gF6/

James W. Andesen, Project Manager Special Projects Office - Licensing Office of Nucle ar Reactor Regulatioi1 Dockct No. 50-423

Enclosure:

As t'ated DISTRIBUT!ON ,

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DOCUMENT NAME: G:%WDERSENVA96402.RAI N b O b isa b b T9 receive e . mpy o' this document. Indicate in the tn,m: 'C' = Copy wqnout attachment +qctosure "E" = Copy with attachment / enc'esure *N* = No copy OFFICE SPO-L:PM a SPO-L:LA ( i h f 'CfdDD l l NAME JAndersen/d LBerry

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OFFICIAL RECORD COPY

pa ns:o, p *, UNITED STATES g NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 30665-0001 February 24, 1998

• ..+

Mr. Martin L Bowling Recovery OEer- Millstone Unit No. 2 Northeast Nuclear Energy Company +

clo Ms. Patricia A. Loftus Director- Regulatory Affairs O. Box 128 haterford, CT 06385

SUBJECT:

REQUEST FOR ADDITIONAL INFORMATION REGARDING EROSION OF CEMENT FROM POROUS CONCRETE SUBFOUNDATION (TAC NO. M96402)

Dear Mr. Bowling:

By letter dated December 19,1997, Northeast Nuclear Energy Company (the licensee) submitted additional information regarding the eros:on of cement from the underlying porous concrete drainage system at Millstone Unit 3. In addition, as part of the Millstone Restart Assessment Plan Significant item List #12 review, the staff reviewed the licensee's safety evaluation," Containment Structure Porous Concrete Drainage System." Based on a review of the December 19,1997, letter, and the above mentioned safety evalaution, the NRC requests additionalinformation related to this topic. You are rerpested to provide the NRC with answers to the enclosed questions. Please respono to this request for additionalinformation expeditiously in order for the staff to complete its review prior to Mode 2 eperations.

Sincerely, Ja es W Andersen, Project Manager

/ Special Projects Office - Licensing Office of Nuclear Reactor Regul.ition Docket No. 50-423

Enclosure:

As stated cc w/ encl: See next page

Northe:st Nuc ; dnergy C:mpany Millstone Nucle:r Pow:r Station

, Unit 3 cc:

Lillian M. Cuoco Esquire Mr. William D. Meinert Senior Nuclear Counsel Nuclear Engineer Northeast Utilities Service Company Massachusets MunicipalWholesale P. O. Box 270 Electric Company Hartford, CT 06141-0270 P.O. Box 426 Ludlow, MA 01056 Mr. Kevin T. A. McCart'hy, Director Monitoring and Radiation Division Joseph R. Egan, Esquire Department of Envirorimental Protection Egan & Associates, P.C.

79 Elm Street 2300 N Street, NW Hartford, CT 06106-5127 Washington, DC 20037 Regional Administrator, Region i Mr. F. C. Rothen U.S. Nuclear F'agulatory Commission Vice Presiden' Work Services 475 Allendale Rud Northeast Utilities Service Company King of Prussia, PA 19406 P. O. Box 128 Waterford, CT 06385 First Selectmen Town of Waterford Ernest C. Hadley, Esquire Hall of Records 1040 B Main Street 200 Boston Post Road P.O. Box 549 Waterford, CT 06385 West Wareham, MA 02576 s

Mr. Wayne D. Lanning Mr. John Buckingham Deputy Director of inspections Department of " Jblic Utility Control Special Projects Office Electric Unit 475 Allendale Road 10 Liberty Squaie King of Prussia, PA 19406-1415 New 'Tritain, CT 06051 Mr. M. H. Brothers Mr. James S. Robinson, Manager Vice President - Operationc Nuclear investments and Administration Northeast Nuclear Energy Company New England Power Company P.O. Box 128 75 Research Drive Waterford, CT 06385 Westborough, MA 01582 Mr. M. R. Scully, Executive Director Mr. D. M. Goebel Connecticut Municipal Electric Vice President - Nuclear Oversight Energy Cooperative Northeast Utilities Service Company 30 Stott Avenue P. O. Box 128 Norwich, CT 06360 Waterford, CT 06385 Mr. David Amerine Deborah Katz, President Vice President - Nuclear Engineering Citizens Awareness Network and Support P.O. Box 83 Northeast Utilities Se vice Company Shelbume Falls, MA 03170 P. O. Box 128 Waterford, CT 06385

Northeast Nuclear Energy Company Millstone Nuclear Power Station

. Unit 3 cc:

Mr. Allan Johanson, Assistant Director Mr. Don Schopfer Office of Policy and Management Verification Team Manager Policy Development and Planning Sargent & Lundy Division 55 E. Monroe Street 450 Capitol Avenue - MS# 52ERN Chicago,IL 60603 P. O. Box 341441 Hartford, CT 00134-1441 Mr. J. P. McElwain Vice President (Acting) - Millstone 3 Citizens Regulatory Commission Northeast Nuclear Energy Company ATTN: Ms. Susan Perry Luxton P.O. Box 128 180 Great Neck Road Wateiford, CT 06385 Waterford, CT 06385 Mr. G. D. Hicks The Honorable Terry Concannon Unit Director - Millstono Unit 3 (

Nuclear Energy Advisory Council Northeast Nuclecr Energy Cornpany Room 4035 P.O. Box 128 Legislative Office Building Waterford, CT 06385 Capitol Avsnue Hartford, CT 06106 Senior Resident inspector Millstone Nuclear Power Station Legislative Office Building clo U.S. Nuclear Regulatory Commissicn Captiol Avenue P. O. Box 513 Hartford, CT 06106 Niantic, Connecticut 06357, Mr. Evan W. Woollacott Co-Chair Nuclear Energy Advisory Council 128 Terry's Plain Road Simsbury, CT 06070 Little Harbor Consultants, loc.

Millstone -ITPOP Project Office P.O. Box 0630 Niantic, CT 06357-0630 Mr. B. D. Kenyon Chief Nuclear Officer- Mi'Istone Northeast Nuclear Energy Company P.O. Box 128 Waterford, CT 06385 Mr. Daniel L. Curry Project Director Parsons Power Group Inc.

2675 Morgantown Road Reading, PA 19607 B

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REQUEST FOR ADDITIONAL INFORMATION EROSION OF CEMENT FROM POROUS CONCRETE SUEEQUNDATION MILLSTONE NUCLEAR POWER STATION. UNIT,3 TAC M96402 4

1. For each of the five effects considered in the safety evaluation (Section 1.2), the licensee chooses to extract conclusions from various reports by its consultants, rather than discussing the applicable portions (test results, results of investigations, expert opinions, i

etc.) of the reports as the basis for certain conclusions. As such, it is difficult for the staff to determine what in the contractor's reporte the licensee utilized in making final concierlois. Please provide a safety assessment that the staff can utilize in making a safetyjudgment regarding the current condition and the future expectations regarding the containment structure's ability to perform its design funct6n. Include the actions (periodic inspections, settlement monitoring, sump residue monitoring, etc.) planned to monitor future conditions.

2. The porous concrete media under the engineering safety features building (where the test cores were taken),is not subject to the some type of construction sequences, seal construction, sustained waterflow, and stress gradients as the porous concrete media under the containment structure. Discuss what, if any, factors were used to account for such differences in the tested parameters.

6 Enclosure

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