ML20128H349
| ML20128H349 | |
| Person / Time | |
|---|---|
| Site: | Seabrook  |
| Issue date: | 06/25/1985 |
| From: | Nerses V Office of Nuclear Reactor Regulation |
| To: | Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 8507090497 | |
| Download: ML20128H349 (34) | |
Text
-
g 2 5 BB5 Docket No.: 50-443 Distribution 50-444 Docket File Local PDR PRC System NSIC APPLICANT: Public Service Company of New Hampshire LB#3 Reading OELD Attorney FACILITY: Seabrook Station, Unit 1 and 2 GWKnighton VNerses
SUBJECT:
MEETING
SUMMARY
JLee On May 24, 1985, NRC and applicant representatives met in Bethesda, Maryland to discuss the cable tray support re-evaluation program. Enclosure 1 provides the list of attendees to this meeting. Enclosure 2 provides the agenda and the applicant's presentation.
The applicant stated that the reason for undertaking the program was to evaluate existing cable tray problems and to apply current cable tray tech-nology to resolve these problems.
As a result of the evaluation, the applicant decided to implement the Bethcel Raceway Program to the Seabrook Project.
The applicant confirmed in this meeting that the cable trays used at Seabrook Station was of the same material and configuration as those used in the test program and that no fireproofing spray is used, which is consistent with the test conditions. The applicant stated that an evaluation of the Seabrook cable tray and support system had been performed and compared with existing test data, and the evaluation results showed that the use of up to 20% damping would be
= appropriate for Seabrook. The staff discussed the information presented by the
. applicant and found that the applicant's approach was acceptable. The staff indicated that we would approve the up to 20% damping for Seabrook if the applicant can provide and document the evaluation results.
The applicant has agreed to revise Sections 3.7 and 3.10 of the FSAR to provide the appropriate information which was presented in this meeting. The staff will review the revised FSAR to confirm the analysis presented in this meeting and the staff's review will be documented in an SER supplement.
/sl
$57]Oy4 gMh3 g PDR Victor Nerses, Project Manager A Licensing Branch No. 3 Division of Licensing
Enclosures:
As stated cc: See next page
- Previously concurred:
-LB#3/DL _ LB#3/DL-
- VNerses:dh *GKnighton 06/17/85- 06/ /85
o
-o' 3
Seabrook Mr. Robert J. Harrison President and Chief Executive Officer Public Service Company of New Hampshire Post Office Box 330 Manchester, New Hampshire 03105 Thomas Dignan, Esq. , E. Tupper Kinder, Esq.
John A. Ritscher, Esq. G. Dana Bisbee, Esq.
Ropes and Gray Assistant Attorney General 225 Franklin Street Office of Attorney General Boston, Massachusetts 02110 208 State Hosue Annex Concord, New Hampshire 03301 Mr. Bruce B. Beckley, Project Manager Public Servic'e Company of New Hampshire Resident Inspector Post Office Box 330 Seabrook Nuclear Power Station Manchester, New Hampshire 03105 c/o US Nuclear Regulatory Commission Post Office Box 700 Dr. Mauray Tye, President Seabrook, New Hampshire 03874 Sun Valley Association 209 Summer Street Mr. John DeVincentis, Director Haverhill, Massachusetts 01839 Engineering and Licensing Yankee Atomic Electric Comoany Robert A. Backus, Eso. 1671 Worchester Road O'Neil, Backus and Spielman Framingham, Massachusetts 01701 116 Lowell Street Manchester, New Hampshire 03105 Mr. A. M. Ebner, Project Manager United Engineers & Constructors Ms. Beverly A. Hollingworth 30 South 17th Street 7 A Street Post Office Box 8223 Hampton Beach, New Hampshire 03842 Philadelphia, Pennsylvania 19101 William S. Jordan, III Mr. Philip Ahrens, Eso.
Diane Curran Assistant Attorney General Harmon, Weiss & Jordan State House, Station #6 20001 S Street, NW Augusta, Maine 04333 Suite 430 Washington, DC 20009 Mr. Warrdh Hall Jo Ann Shotwell, Esq. Public Service Company of Office of the Assistant Attorney General New Hampshire Environmental Protection Division Post Office Box 330 One Ashburton Place Manchester, New Hampshire 03105 Boston, Massachusetts 02108 Seacoast Anti-Pollution League D. Pierre G. Cameron, Jr. , Esq. Ms. Jane Doughty General Counsel 5 Market Street Public Service Company of New Hampshire Portsmouth, New Hampshire 03801 Post Office Box 330 Manchester, New Hampshire 03105 Mr. Diana P. Randall 70 Collins Street Regional Administratnr - Region I Seabrook, New Hampshire 03874 U.S. Nuclear Regulatory Connission 631 Park Avenue King of Prussia, Pennsylvania 19406
4 Mr. Calvin A. Canney, City Manager Mr. Alfred V. Sargent, City Hall Chairman 126 Daniel Street Board of Selectmen Portsmouth, New Hampshire 03801 Town of Salisbury, MA 01950 Ms. Letty Hett Senator Gordon J. Humphrey Town of Brentwood U. S. Senate RFD Dalton Road Washington, DC 20510 Brentwood, New Hampshire 03833 (Attn: Tom Burack)
Ms. Roberta C. Pevear Senator Gordan J. Humphrey Town of Hampton Falls, New Hampshire 1 Pillsbury Street Drinkwater Road Concord, New Hampshire 03301 Hampton Falls, New Hampshire 03844 (Attn: HerbRoynton)
Ms. Sandra Gavutis Mr. Owen B. Durgin, Chairman l Town of Kensington, New Hampshire Durham Board of Selectnen RDF 1 Town of Durham East Kingston, New Hampshire 03827 Durham, New Hampshire 03824 Charles Cross, Esq.
Chairman, Board of Selectmen Shaines, Mardrigan and Town Hall McEaschern South Hampton, New Hampshire 03827 25 Maplewood Avenue Post Office Box 366 Mr. Angie Machiros, Chairman Portsmouth, NH 03801 Board of Selectmen for the Town of Newbury Newbury, Massachusetts 01950 Mr. Guy Chichester, Chaiman Rye Nuclear Intervention Ms. Rosemary Cashman, Chairman Committee Board of Selectmen c/o Rye Town Hall Town of Amesbury 10 Central Road Town Hall Rye, New Hampshire 03870 Amesbury, Massachusetts 01913 Jane Spector Honorable Richard E. Sullivan Federal Energy Regulatory Mayor, City of Newburyport Commission Office of the Mayor 825 North Capital Street, NE City Hall Room 8105 Newburyport, Massachusetts 01950 Washington, D. C. 20426 Mr. Donald E. Chick, Town Manager Mr. R. Sweeney Town of Exeter New Hampshire Yankee Division 10 Front Street Public Service of New Hampshire Exeter, New Hampshire 03823 Company 7910 Woodmont Avenue Mr. William B. Derrickson Bethesda, Maryland 20814 Senior Vice President Public Service Company of New Hampshire Post Office Box 700, Route 1 Seabrook, New Hampshire 03874
ENCLOSURE 1 MEETING MAY 24, 1985 A. Dufault UEC R. Sweeney EBASCO P. McMahon BECHTEL R. Linderman BECHTEL K. Lee BECHTEL R. White YANKEE ATOMIC V. Nerses NRC/NRR/DE/SGEB J. Ma NRC/NRR/DE/SGEB S. Chan' . NRC/NRR/DE/SGEB G. Rigamonti UE&C R. Tucker YAEC
..) *
~
ENCLOSURE 2 SEABROOK CABLE TRAY DAMPING MEETING AGENDA o INTRODUCTION (R. TUCKER / YAEC) o CABLE TRAY TEST PROGRAM (B. LINDERMAN / BECHTEL) o CABLE TRAY TEST MOVIE (OPTIONAL) o OVERVIEW OF TEST PROGRAM RESULTS (B. LINDERMAN / BECHTEL) o SEABROOK REVIEW (P. McMAHON / BECHTEL) o DESIGN IMPLEMENTATION (A. DUFAULT / UE&C) o CONCLUSIONS (R. TUCKER / YAEC) o DISCUSSION
>a O
INTRODUCIION o CURRENT CONSTRUCTION STATUS
- OVERALL PLANT CONSTRUCTION IS 86% COMPLETE
- 98% OF THE CABLE TRAY AND VERTICAL TRAY SUPPORT SYSTDI IS COMPLETE
- LATERAL BRACING IS 75% COMPLETE
- AXIAL SRACING IS 5% COMPLETE o PURPOSE OF THE CABLE TRAY STUDY o RESULTS OF THE STUDY
- IMPLEMENTATION OF THE BECHTEL RACEWAY PROGRAM o BENEFITS OF ADOPTING THE PROGRAM
- REDUCE CHANGE 0UT OF CONNECTION HARDWARE
- REDUCE INSTALLATION PROBLEMS
- REDUCE COMPLEXITY OF ANTICIPATED MODIFICATIONS FROM 100%
QA REINSPECIION
- IMPROVE CONSTRUCTION SCHEDULE o ORGANIZATION NHY I
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UE6C BECHTEL
s RACEWAY TEST PROGRAM PURPOSE ,
e TO UNDERSTAND THE DYNAMIC BEHAVIOR OF RACEWAY SYSTDiS AND ESTABLISH REALISTIC DAMPING CHARACTERISTICS, FREQUENCY RESPONSES, AND THE ACTUAL ELASTIC AND INELASTIC BEHAVIOR OF THE SYSTDfS.
e FURNISH DATA FOR DEFINING BETTER METHODS OF ANALYSIS FOR BOTH PRESENT AND FUTURE FACILITIES.
e DEMONSTRATE CIRCUITS REMAIN FUNCTIONAL EVEN WITH PLASTIC DEFOR!!ATION OF RACEWAY SYSTEMS.
o DETERMINE CAPABILITIES OF INSTALLED SYSTEMS IN EXISTING FACILITIES TO RESIST EARTHQUAKE MOTIONS.
RACEWAY TEST PROGRAM (CONT)
HETHOD e STARTING WITH THE SIMPLEST DESIGN SUCH AS ONE USED FOR A FOSSIL POWER PLANT, TO UPGRADE THE SYSTEMS BY TESTING, UNTIL AN ACCEPTABLE AND STABLE' LEVEL OF BEHAVIOR OF THE SYSTEM IS ACHIEVED.
- TO EXTENSIVELY TEST THESE SELECTED SYSTEMS TO GENERATE STATISTICAL DATA BASES.
e USE DATA BASES TO ESTABLISH ADEQUATELY CONSERVATIVE DESIGN CRITERIA AND PROCEDURES.
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o HANGER LENGTH e HANGER CONNECTIONS e NUMBER OF TRAYS e NUMBER OF CONDUITS e CONDUIT SIZES e CONDUIT CLAMPS e FITTINGS e BRACING e INPUT MOTION DIRECTION
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4 e LADDER TYPE MANUFACTURED BY B-LINE SYSTEMS INC. .
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- e ALUMINUM LADDER TYPE MANUFACTURED BY P-W INDUSTRIES ALUMINUM GUTTER WIREWAY WITH COVER MANUFACTURED BY SUN METAL PRODUCT
- WAS ALSO TESTED.
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9 CABLE TRAY TEST PROGRAM MOVIE
SUM!!ARY OF CABLE TRAY TEST RESULTS STRUT SUPPORTED TRAY SYSTEMS e HIGH DAMPING WITH VALUES RANGING TO 50% OF CRITICAL FOR TRAYS WITH CABLE LOADING FROM 25 TO 50 LES/FT. DAMPING REDUCES TO 7% OF CRITICAL WITH NO CABLE LOADING.
o DAMPING INCREASES WITH INCREASING FLOOR RESPONSE LEVEL.
- BRACING / RIGIDITY IS DESIRABLE BECAUSE IT INCREASES THE RESONANT FREQUENCY, DECREASES DEFLECTIONS AND INCREASES THE DAMPING IN THE SYSTEM.
e CABLES DO NOT APPEAR TO INFLUENCE OVERALL SYSTEM RESPONSE EXCEPT FOR DAMPING AND THEIR MASS.
o ALL STRUT SUPPORTED CABLE TRAYS TESTED SURVIVED WITHOUT DAMAGE.
THESE SYSTEMS WERE TESTED AT INPUT LEVELS (ZPA VALUE) 0F 1 TO 3 G'S TO THE SHAKE TABLE.
SEABROOK REVIEW:
o DOCUMENTATION REVIEW o CRITERIA REVIEW 1
o STANDARD DETAILS REVIEW
! o PLANT WALKDOWN i
o SYSTEM COMPATIBILITY WITH THE TEST PROGRAM S
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IMPLEMENTATION OF 20% DAMPING AT THE SEABROOK STATION DESIGN o GUIDELINES HAVE BEEN DEVELOPED TO ESTABLISH THE SIGNIFICANT CONTROLLING PARAMETERS SUCH AS CONFIGURATION, TRAY MATERIALS, STRUT MATERIALS AND CONNECTION HARDWARE.
INSTALLATION o DETAILED SUPPORT DRAWINGS FOR EACH SUPPORT WILL BE ISSUED TO CONSTRUCTION.
o ALL SUPPORTS WILL BE REINSPECTED TO THE DETAILED SUPPORT DRAWINGS.
APP _LICATION o USE OF THE 20% DAMPING WILL BE ON A CASE-BY-CASE BASIS.
o APPLICATION EXAMPLES:
o RESOLUTION OF CONSTRUCTION FABRICATION PROBLEMS o SIMPLIFIED RESOLUTION OF INTERFERENCES WITH FIELD RUN COMPONENTS o OPTIMIZATION OF CONNECTION SIZES o OPTIMIZATION OF CONNECTION CHANGES
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- I CONCLUSIONS o DAMPING IS DEVELOPED BY CABLE MOTION.
o SEABROOK CABLE TRAY SUPPORTS ARE ESSENTIALLY RIGID.
o 20% DAMPING OPTIMIZES DESIGN.
o ENGINEERING / CONSTRUCTION SAVINGS CAN BE REALIZED WIT 110UT DECREASING THE QUALITY AND SAFETY OF THE SYSTEM.
o IM:!EDIATE IMPLEMENTATION IS REQUIRED TO REALIZE OPTIMAL BENEFIT.
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