Published December 1972 | Version v1
Report Restricted

Interim Report on the Behaviour of Reactor Group UKAEA Compatibility Specimens Exposed in Dragon Heat Exchangers

Creators

Description

A number of materials are being exposed to reactor coolant at about 670-690°C in Dragon heat exchangers. The programme covers coupons, crevices and pressurised tubes. Gravimetric and metallographic results are reported for specimens withdrawn after 2,300 hours and gravimetric results only for specimens exposed for 4,650 hours. High temperature materials generally showed low and decreasing rates of interaction with the coolant, with some evidence for gas-phase depletion effects within crevices; carbide precipitation (believed to be an ageing rather than an atmosphere effect) was also observed. Mild steel decarburised throughout, but 1 Cr J 1/2 Mo apparently only within a zone (ca. 0.5 x 10-3 in.) subject to internal oxidation.

Files

Restricted

The record is publicly accessible, but files are restricted to users with access.

Additional details

Publishing Information

Imprint Pagination
32 p.
Report number
DP-R--816

INIS

Country of Publication
United Kingdom
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
54039573
Subject category
S21: SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS;
Descriptors DEI
CARBIDES; COOLANTS; FEDERAL REPUBLIC OF GERMANY; FORSCHUNGSZENTRUM JUELICH; HEAT EXCHANGERS; HTGR TYPE REACTORS; METALLOGRAPHY; OXIDATION; PRESSURE TUBES; STEELS; TEMPERATURE RANGE 0400-1000 K
Descriptors DEC
ALLOYS; CARBON ADDITIONS; CARBON COMPOUNDS; CHEMICAL REACTIONS; DEVELOPED COUNTRIES; EUROPE; GAS COOLED REACTORS; GERMAN FR ORGANIZATIONS; GRAPHITE MODERATED REACTORS; IRON ALLOYS; IRON BASE ALLOYS; NATIONAL ORGANIZATIONS; REACTORS; TEMPERATURE RANGE; TRANSITION ELEMENT ALLOYS; TUBES; WESTERN EUROPE

Optional Information

Notes
Document from Juelich Preservation Project; 4 refs., figs., tabs.