ML20128F346

Forwards Comparison of SSAR & Industry Initiatives on Piping Design & Analyses to Support Accelerated ABWR Review Schedule

ML20128F346
Person / Time
Site:	05200001
Issue date:	02/04/1993
From:	Fox J GENERAL ELECTRIC CO.
To:	Poslusny C Office of Nuclear Reactor Regulation
References
NUDOCS 9302110358
Download: ML20128F346 (6)

Text

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GE MucIcar Energy

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D February 4,1993 Docket No. STN 52 001 Chet Poslusny, Senior Project Manager Stan<lardization Project Directorate Associate Directorate for Advanced Reactors and License Renewal Office of the Nuclear Reactor Regulation

Subject:

Submittal Supporting Accelerr,ted AllWR Review Schedule

Dear Chet:

Enclosed is a com aarison of SSAR and industry initiatives on pip,ing design and analyses. This Inc udes the potential elimination of the combination of AP + SSE. The justification for this elimination is provided under Note 2 on the last page.

Please provide a copy of this transmittal to David Terao.

Sincerely, Ja-Fox l

Advanced Reactor Programs cc: Maryann lierzog (GE)

Norman Fletcher (DOE) l l

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COMPARISON OF SSAR AND INDUSTRY INITIATIVES ON PIPING DESIGN AND ANALYSES 1

I e IN NOVEMilER, IN A MEETING WITI! ARC, STAFF MANAGEhfENT ENCOURAGED LNDUSTRY TO GET TOGETIIER FOR TIIE PURIOSES OF:

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- INCORPORATING INTO TIIE LEAD CERTIFICATION APPLICATION, TO TIIE MAXIMUM EXTENT PRACTICAL, 3

l INDUSTRY INITIATIVES PERTAINING TO PIPING.

- IDENTIFYING T1IE EXTENT TO WillCII TIIE LEAD CERTIFICATION APPLICATION COULD ACCOMMODATE TIIE INDUSTRY PIPING INITIATIVES.

- IDENTIFYING TIIOSE AREAS WIIICII WILL NRT BE INCOR10 RATED IN TIIE DESIGN CERTIFICATION.

O ATI'ACIIED IS A COMPARISON OF TliE INDUSTRY INITIATIVE FOR PIPING AND TIIE ABWR SSAR APPROACII SIIOWING AGREEMENT TO A IIIGli DEGREE.

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PLANT SEISMIC DESIGN BASES i

COMPARISON OF ABWR -INDUSTRY POSITIONS l

l lNDUSTRY POSITION:

ABWR SSAR POSITION GROUND MOTION:

l RG 1.60 ANCHORED TO 0.3g SAME GROUND MOTION APPLIED AT GROUND MOTION APPLIED AT

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SURFACE OF FREE FIELD SURFACE FOR BASE CASE.

FOR PARAMETRIC CASE APPLY AT 2

l ROCK OUTCROP FOR SHALLOW SOIL SITES.

GEOLOGIC CATEGORIES:

l MIN SHEAR WAVE VELOCITY OF USE MIN SHEAR WAVE 305 MPS

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40u METERS /SEC (1300 FPS)

(1000 FPS) j PARAMETERS FOR SEVEN PLUS A RANGE OF SHEAR WAVE CATEGORIES OF SOIL-VELOCITIES e

j CONDITIONS, PLUS RANGE OF 12 DIFFERENT PROFILF e 1

PROPERTIES FOR EACH CONSIDERED CATEGORY.

f SSI MODEL AND ANALYSIS:

USE GENERAL GUIDELINES IN ASCE FAME 4

STD 4 86 FOR MODEL i

FOLLOW SRP AND ASCE 4 86 FOR SAME ANALYSIS USE SOIL PROFILES CONSISTENT USE 12 DIFFERENT PROFILES.

WITH THE 7 SOIL-(THESE FALL WITHIN THE RANGE CATEGORIES, PLUS RANGE OF OF INDUSTRY PROFILES)

PROPERTIES FOR EACH

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CATEGORY.

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CONCLUSION:

ABWR ENVELOPE SHOULD ENVELOPE RESULTS OF INDUSTRY POSITION.

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PIPING DESIGN AND ANALYSIS COMPARISON OF ABWR -INDUSTRY POSITIONS i

INDUSTRY POSITION ABWR SSAR POSITION PIPING SEISMIC INPUT:

j MAKE ENVELOPE AND INDIVIDUAL DESIGN / ANALYZE FOR ENVELOPE i

FRS SETS AVAILABLE FRS.

EMPHASIZE INDIVIDUAL FRS USE INDIVIDUAL FRS SETS ONLY IF SETS TO MINIMlZE SUPPORTS DESIGN OBJECTIVES'" "" NOT MET WITH ENVELOPE FRS.

DAMPlNG USE MAX APPROVED DAMPlNG.

SAME DAMPlNG OBJECTIVES ARE:

4 USE 6% FOR SSE USE CC N-411 WITH T H USE CC N 411 FOR ISM USE APPROVED METHODS FOR SAME COMBINING MODES ABOVE ZPA (PREFER ALGEBRAIC SUM) i COMBINEINERTIA AND SAM BY SRSS SAME COMBINE DYNAMIC LOADS BY SRSS SAME (HoptpubbY) 3 DO NOT COMBINE LOCA AND SSE THE ABWR SSARAHAS ELIMINATED THE COMBINATION OF AP + SSE'" " 88 WHERE APPROPRIATE, REPLACE SAME SNUBBERS WITH:

LIMIT STOPS ENERGY ABSORBERS DYNAMIC STRESS CRITERIA:

SAME USE PFDRRP CRIT. WHEN APPROVED USE DESIGN BY RULE WHEN

-APPROVED CONCWSION:

NO SIGNIFICANT ABWR-INDUSTRY DIFFERENCES

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l. NOMENCLATURE:

FRS. FLOOR RESPONSE SPECTRA CC N 411 AN ASME CODE CASE THAT PERMITS USE OF DAMPING HlGHER THAN RG 1.61. APPROVED WITH CONDITIONS BY NRC.

T H + TIME HISTORY METHOD FOR DYNAMIC ANALYSIS OF EQUlPMENT ISM INDEPENDENT SUPPORT MOTION A DYNAMIC ANALYSIS METHOD FOR PERFORMING RESPONSE SPECTRA ANALYSIS THAT CONSIDERS MOTION OF EACH SUPPORT POINT INDEPENDENTLY.

ZPA ZERO PERIOD ACCELERATION SAM - SEISMIC ANCHOR MOTIONS. REFERS TO EFFECTS ON PIPING OF RELATIVE MOTION OF VARIOUS SUPPORT POINTS PFDRRP + PIPING AND FITTING DYNAMIC RESPONSE RESEARCH PROGRAM - THE EPRl/GElNRC PROGRAM FOR TESTING PIPE FITTINGS AND SYSTEMS FOR RESPONSE TO VARIOUS DYNAMIC LOADS.

11. NOTES:

1.

DESIGN OBJECTIVES (PIPING)

ELIMINATE ALL SNUBBERS, OPTIMlZE PIPE SUPPORT SYSTEMS -

2.

SINCE AP, NOW DEFINED IN SSAR AS LOCA,,IS MORE SEVERE THAN LOCA,..

THE ABWR POSITION APPROACHES THAT OF INDUSTRY.

JUSTIFICATION FOR ELIMINATING THIS COMBINATION IS:

- _AP AND SSE ARE INDEPENDENT EVENTS, EACH WITH A VERY LOW -

PROBABILITY OF OCCURRENCE. THE PROBABILITY OF THESE TWO EVENTS OCCURRING SIMULTANEOUSLY IS EXTREMELY REMOTE.

- SHORT DURATION OF AP LOAD (ONLY 0.3 SECONDS), FURTHER REDUCES PROBABILITY OF SIMULTANEOUS OCCURRENCE WITH SSE.

- AP IS RESULT OF A POSTULATED RUPTURE AT SPECIFIC LOCATION (RPV NOZZLE)_ AND IN SPECIFIC PIPING SYSTEMS.