ML20128H351
| ML20128H351 | |
| 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: ML20128H351 (34) | |
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Docket No.: 50-443 Distribution 50-444 Docket File Local PDR PRC System NSIC APPLICANT: Public Service Company of New Hampshire LB#3 Reading 0 ELD 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 I provides l the list of attendees to this meeting. Enclosure 2 provides the agenda y 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 Betchel Raceway Program to the Seabrook Project. The applicant confirmed in this neeting 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 condition;. 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. We discussed the information presented by the applicant and found that the applicant's approach was acceptable. We 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. C J Victor Nerses, Project Manager Licensing Branch No. 3 Division of Licensing
Enclosures:
As stated cc: See next p o
*Previously cred:
LB#3/DL
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8 a ne uq kg UNITED STATES fhf h [a- , ; NUCLEAR REGULATORY COMMISS'ON
$ 'j WASHINGTON, D. C. 20555
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/ g '2 b teos Docket No.: 50-443 50-444 APPLICANT: Public Service Company of New Hampshire FACILITY: Seabrook Station, Unit 1 and 2
SUBJECT:
MEETING
SUMMARY
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 tne 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 confinn the analysis presented in this meeting and the staff's review will be documented in an SER supplement. Victor Nerses, Project Manager Licensing Branch No. 3 Division of Licensing
Enclosures:
As stated cc: See next page
- p v
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. Dant OisDee, Esq. Ropes and Grav Assistant Attorney General 225 Franklh Street Office of Attorney General Boston, assachusetts 02110 208 State Hosue Annex Concord, New Hampshire 03301 Mr. Hruce B. Pack)cy, Project Manager Pablic Service Company of New Hampshire Resident Inspector Post Office Box 330 Seabrook Nuclear Power Statinn Manchester, New Hampshire 03105 c/o US Nuclear Regulatory Commission Post Office Box 700 Dr. Mauray Tye, President Seabronk, New Hampshire 0?87a Sun Valley Association P09 Sumer Street Mr. John DeVincentis, Director Haverhill, Massachusetts 01839 Engineering and Licensing Yankee Atomic Electric Cnnoany Robert A. Backus, Esc. 1671 Worchester Road O'Neil, Backus and Spielman Framingham, Massachusetts 01701 116 Lowell Street Manchester, New Hampshire 03105 Pr. A. M. Ebrar, Pro.iect Manager United Engineers A constructort Ms. Beverly A. Hollingworth 30 South 17th Street 7 A Street Post Office Box 82?3 Hampton Beach, New Hampshire 03842 Philadelphia, Pennsylvania 19101 William S. Jordan, Ifl Mr. Philip Ahrens, Eso. Diane Curran Assistant Att1rney General Harnon, Weiss & Jordan State House, Station #6
?0001 S Street, NW Augusta. Maine 04333 Suite 430 Washington, DC 20009 Mr. Warren Hall do Ann Shotwell, Esq. Public Service Company of Office of the Assistant Attorney General New Harpshire Environmental Protection Division Post Office Bor 330 One Ashburton Place Manchester, New Hempshire 03105 Boston, Massachusetts 0?!08 Scacoast Anti-Pallution League D. Pierre G. Cancron, Jr., Esq. Ms. Jane Douqtty General Counsel 5 Market Street Public Scryice Company of New Hamrshire Portsmouth, New Hampshire 03P01 Post Office Box 330 Manchester, New Hampshire 03105 Mr. Diant P. Randall 70 Collins Street Regional Administrator Region ! Seabrnd , New Hampshire 03A74 U.$. Nuclear Regulatory Comission 611 Park Avenue King of Prussia, Pennsylvanii 19406
O O 2-Mr. Calvin A. Canney, City Manager Mr. Alfred V. Sargent, City Hall Chaiman 126 Daniel Street Board of Selectmen I Portsmouth, New Hampshire 03801 Town of Salisbury, MA 01950 Ms. Letty Hett Senator fiordon 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 Drirawater Road Concord, New Hampshire 033:1 Hampton Falls, New Hampshire 03844 (Attn: HerbReynton) Ms. Sandra Gavutis Mr. Owen B. Durgin, Chairman Town of Kensington, New Hampshire Duinam Board of Selectmen RDF 1 Town of Durham East Kingston, New Hampshire 03827 Durham, New Hampshire 03824 Charles Cross, Esq. i Chairman, Board of Selectmen Shaines, Mardrigan and : Town Hall McEaschern ! South Hampton, New Hampshire 03827 25 Maplewood Avenue Post Office Box 366 Pr. Angie Machiros, Chairsan Portsmouth, NH 03801 Roard of Selectmen for the Town of Newbury Newbury, Massachusetts 01950 Mr. Guy Chichester, Chaiman Rye Nuclear Intervention Ms. Rosenary Cashman, Chairman Comittee anard of Selectmen c/o Rye Town Hall
- Town of Amesbury 10 Central Road
-Tiwn Hall Rye, New Hampshire 03870 kosbury, Massachusetts 01913 -
Jane Spector
- Ho*orable Richard E. Sullivan Federal Energy Regulatory l Mayar, City of Newburyport Comission Office of the Mayor 825 North Cap' cal Street, NE C1ti Hall Room 8105 New'
- uryport, Massachusetts 01950 Washin9 ton, D. C. 20426 Mr. Donald E. Chick, Town Manager Mr. R. Sweeney Tow, of Exeter New Hampshire Yankee Division '
l 10 iront Street Public Service of New Hampshire j Exe or, New Hampshire 03A23 Company 7910 Woode.ont Avenue Mr. Jilliam R. Derrickson Methesda, Maryland 20R14 l Seni)r Vice President ; i Pub 1fc $ctvice Cornpany of
'!t
- Hameshire i Pos' difice Box 700, Route 1 Seat nok New Hampshire 03874
_ _ _ _ _ _ - _ _ _ _ _ _ - _ _ - _ _ __J
O O ENCLOSURE 1 MEETING MAY 24, 1985 I 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. Rigamenti UE&C R. Tucker YAEC l f
o o ENCLOSURE 2 l l SEABROOK CABLE TRAY DAMPING l 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 / UE6C) o CONCLUSIONS (R. TUCKER / YAEC) o DISCUSSION
O O INTRODUCTION i o CURRENT CONSTRUCTION STATUS
- OVERALL PLANT CONSTRUCTION IS 86% COMPLETE
- 98% OF THE CABLE TRAY AND VERTICAL TRAY SUPPORT SYSTEM IS COMPLETE l
- LATERAL BRACING IS 75% COMPLETE
- AXIAL BRACING 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 REINSPECTION
- IMPROVE CONSTRUCTION SCHEDULE o ORGANIZATION NHY l l .
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t RACEWAY TEST PROGRAM l PURPOSE o TO UNDERSTAND THE DYNAMIC BEHAVIOR OF RACEWAY SYSTDiS AND ESTABLISH REALISTIC DAMPING CHARACTERISTICS, FREQUENCY RESPONSES, AND THE ACTUAL ELASTIC AND INELASTIC BEHAVIOR OF THE SYSTDiS. o FURNISH DATA FOR DEFINING BETTER METHODS OF ANALYSIS FOR BOTil FRESENT AND FUTURE FACILITIES. o DEMONSTRATE CIRCUITS REMAIN FUNCIIONAL EVEN WITil PLASTIC DEFORMATION OF RACEWAY SYSTEMS. o DEIERMINE CAPABILITIES OF INSTALLED SYSTEMS IN EXISTING FACILITIES TO RESIST EARTilQUAKE MOTIONS. I
O O RACEWAY TEST PROGRAM (CONT) l l METHOD 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. e TO EXTENSIVELY TEST THESE SELECTED SYSTEMS TO GENERATE STATISTICAL l DATA BASES. e USE DATA BASES TO ESTABLISH ADEQUATELY CONSERVATIVE DESIGN CRITERIA AND PROCEDURES. l e l .
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6 TEST PROGRAM TASKS TASK A - FIXTURE DESIGN AND CONSTRUCTION TASK B INITIAL - PRELIMINARY TESTING TASK B - CABLE TRAY RACEWAY SYSTEMS TASK C - CONDUIT RACEWAY SYSTEMS TASK D - COMBINED RACEWAY SYSTDIS TASK E - FATIGUE LIFE OF CONNECTIONS TASK F - CAPACITY OF CLAMPS 9 O 3 1 t l
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O O TEST VARIABLES o TRAY AND CONDUIT TYPES o TRAY AND CONDUIT LOADING o HANGER TYPES o HANGER LENGTH o HANGER CONNECIIONS o NUMBER OF TRAYS o NUMBER OF CONDUITS o CONDUIT SIZES o CONDUIT CLAMPS o FITTINGS o BRACING o INPUT MOTION DIRECTION 9
CABLE TRAY j FIVEDIFFERENTTYPESOFCABLETRAYSWERESELECTEDTOBETESTID< e LADDER TYPE MANUFACTURED BY B-LINE SYSTEMS INC. . j e LADDER TYPE MANUFACTURED BY METAL PRODUCTS CORPORATION. I e PUNCH BOTTOM TYPE MANUFACTURED BY B-LINE SYSTEMS INC, e TROUGH TYPE MANUFACTURED BY HUSKY-BURNDY e ALUMINUM LADDER TYPE MANUFACTURED BY P-W INDUSTRIES ) ALUMINUM GUTTER WIREWAY WITH COVER MANUFACTURED BY SUN METAL PRODUCT l WAS ALSO TESTED. e i I I
TEST' MOTION SNAP BACK - FIXED SUPPORTS HARMONIC MOTION ! EARTHQUAKE MOTION i 9 i
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F SUM!!ARY OF CABLE TRAY TEST RESULTS STRUT SUPPORTED TRAY SYSTEMS e HIGil DAMPING WITil VALUES RANGING TO 50% OF CRITICAL FOR TRAYS WITH CABLE LOADING FROM 25 TO 50 LBS/FT. DAMPING REDUCES TO 7% OF CRITICAL WITil NO CABLE LOADING. o DAMPING INCREASES WITil INCREASING FLOOR RESPONSE LEVEL. o BRACING / RIGIDITY IS DESIRABLE BECAUSE IT INCREASES THE RESONANT FREQUENCY, DECREASES DEFLECTIONS AND INCREASES THE DA!! PING IN THE SYSTEM.
- CABLES DO NOT APPEAR TO INFLUENCE OVERALL SYSTEM RESPONSE EXCEPT FOR DA!! PING AND TilEIR !! ASS.
e ALL STRUT SUPPORTED CABLE TRAYS TESTED SURVIVED WITHOUT DAMAGE. TilESE SYSTEMS WERE TESTED AT INPUT LEVELS (ZPA VALUE) 0F 1 TO 3 C'S TO Tile SilAKE TABLE. l
SEABROOK REVIEW: o DOCUMENTATION REVIEW e CRITERIA REVIEW o STANDARD DETAILS REVIEW o PLANT WALKDOWN o SYSTEM COMPATIBILITY WITH THE TEST PROGRAM 9 e O
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V (_)/ 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, j 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. APPLICATION o USE OF THE 20% DAMPING WILL BE ON A CASE-BY-CASE BASIS. o APPLICATION EX#!PLES: o RESOLUTION OF CONSTRUCTION FABRICATION PROBLEMS o SIMPLIFIED RESOLUTION OF INTERFERENCES WITH FIELD RUN COMPONENTS o OPTIMIZATION OF CONNECTION SIZES o OPTIMIZATION OF CONNECTION CHANCES
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,) CONCLUSIONS o DAMPING IS DEVELOPED BY CABLE MOTION.
o SEABROOK. CABLE TRAY SUPPORTS ARE ESSENTIALLY RIGID. o 20% DAMPING OPTIMIZES DESIGN. so ENGINEERING / CONSTRUCTION SAVINGS CAN BE REALIZED WIT 110UT DECREASING THE QUALITY AND SAFETY OF THE SYSTEM.
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o IMMEDIATE IMPLEMENTATION IS REQUI' RED TO REALIZE OPTIMAL BENEFIT. C
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