ML20083N946

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Forwards Branch Technical Position MTEB-5-5 Re Fracture Toughness Testing Requirements for ASME Code Class 2 & Class 3 Components,Per B Albert Request
ML20083N946
Person / Time
Site: Satsop
Issue date: 01/13/1983
From: Trapp O
WASHINGTON PUBLIC POWER SUPPLY SYSTEM
To: Wheeler D
Office of Nuclear Reactor Regulation
References
GO3-83-40, NUDOCS 8302030282
Download: ML20083N946 (3)


Text

, 4 g) - SOP Washington Public Power Supply System Box 1223 Elma Washington 98541 (200)482-4428 January 13, 1983 G03-83-40 Mr. Duke Wheeler Division of Licensing - Branch 3 Nuclear Regulatory Commission liail Stop Philip 145 7920 Norfolk Avenue Bethesda, Maryland 20014

Subject:

BRANCH TECHNICAL POSITION MTEG-5-5 Enclosed is a copy of Branch Technical Position MTEB-5-5 which Bill Albert asked me to send you.

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P oject QA Marager, WNP-3 LJAY:nj Enclosure cc: J. Adams - NESCO D. Smithpeter - BPA Ebasco - New York WNP-3 Files - Richland f001 8302030282 830113 PDR ADOCK 05000508 A PDR

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M 13 N BRANCH TECHNICAL POSITION hTEB 5-5 FRACTURE TOUGHNESS REQUIREMENTJ FOR ggs pflEAllC$3ASMH d' ODE CLASS 2 AND CLASff 3 COMPONENTS -

l A. Background -

The ASME Code requires fracture toughness testing for Class 2 and Class 3 components only when stated li2 the Design Specification. The intention of this position is to provide for appropriato mandatory minimum fracture toughness requiremants for all.ferritic materials of pressure retaining Class 2 and Class 3 systamg.

B,. Definitions

1. "" Code"' refers to the 1974 Edition of the ASME Boiler and Pressure Vessel Code,Section III.

2.. " Passive" pressure retaining components are vessels,.

tanks, piping, tubos, pumps, valves and fittings not part of an active reactor system required for normal operating, including startup and shutdown, but are on standby, and maintain a constant pressure at.all-times; such that when called upon to perform their C'- ~

safety-related function there is no increase in pressure stress or thermal stress.

C. Branch Technical Position

1. All Code class 2 and class 3 component pressd,re re-talning materials except those described in paragraphs

. . Nc/ND-2311(b), (1) through (7) shall be tested for fracture toughness according to the procedures, re-qttirements and acceptance standards of NC/ND-2320 tMough NC/ND-2360 Por materials with, thickness ex*

ceeding 2-1/2 inch, except those covered by C.2 below,

. the lowest service ts:nperature as described in para-graphs NCfMD-2332 (d) shall not b lower than

. RTNDT+100 F unless a lower temperature is justified by methods similar to those contained in Appandix G.

, 2. Code class 2 and class 3 passive pressure retaining compononts as defined in B.2 above with wall thick-neas exceeding 2-1/2 inch as described in NC/ND-2332 may meet the following requiremont. The lowgst service

. . temperature shall not be lower than RTNDT+30 P unloos l

a lower temperature is justified by'6ethods similar to s,

those contained in Appendfx G as stated in NC/ND-2332(d)

. rather than the RTNDT+100 P required above, provided l.rCErdmG INTURMATION -

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