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Use of Subsize Specimens for Determination of Radiation Embrittlement of Operating Reactor Pressure Vessels

Amayev, AD
Head of laboratory, deputy head of laboratory, and senior researcher,I. V. Kurchatov Institute of Atomic Energy,

Badanin, VI
Senior researcher and head of laboratory,Central Research Institute of Structural Materials,

Kryukov, AM
Head of laboratory, deputy head of laboratory, and senior researcher,I. V. Kurchatov Institute of Atomic Energy,

Nikolayev, VA
Senior researcher and head of laboratory,Central Research Institute of Structural Materials,

Rogov, MF
Head of division,OKB “Gidropress,”,Moscow region,

Sokolov, MA
Head of laboratory, deputy head of laboratory, and senior researcher,I. V. Kurchatov Institute of Atomic Energy,

Pages: 16    Published: Jan 1993

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Source: STP1204-EB

Abstract

This paper presents groundwork for determining the ductile-to-brittle transition temperature (DBTT) from subsize specimens (5 by 5 by 27.5 and 3 by 4 by 27.0 mm) and describes the correlation between the DBTT obtained from tests of standard Charpy specimens and subsize specimens. A method for taking samples from the inside surface of reactor pressure vessels and fabricating small specimens from them was developed in the USSR. This method is used to assess the effectiveness of pressure vessel recovery by annealing. Some results of the DBTT evaluation for the base and weld metal before and after recovery are given.

Keywords:
Charpy, reactor pressure vessel, annealing, ductile-to-brittle transition temperature (DBTT)

Paper ID: STP12746S
Committee/Subcommittee: E10.04
DOI: 10.1520/STP12746S
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