Published June 13, 1984 | Version v1
Patent Metadata-only

BWR type power plants with low radioactivity

Creators

  • 1. Tokyo Electric Power Co., Inc. (Japan)

Description

Purpose: To decrease the operator's exposure by reducing the radiation dose of the pipeways around the reactor. Constitution: Recycling pipeways and cleanup pipeways of a reactor are made of stainless steels having passivated membranes. Stainless steels having such passivated membranes are prepared by immersing stainless steels into an aqueous 12 - 17 volume % nitric acid solution at 40 - 600C for 15 - 20 min. In the case of using the thus passivated stainless steels to the pipeway, since Co-60 concentration at the surface of the stainless steels can significantly be decreased, exposure to the operators upon periodical plant inspection can also be decreased. (Moriyama, K.)

Availability note (English)

Available from JAPATIC. Also available from INPADOC.

Additional details

Publishing Information

Imprint Pagination
3 p.
IPC:
Int. Cl. G21D1/00; F16L58/02.
IPC
Int. Cl. G21D1/00; F16L58/02.
Patent number
JP patent document 59-102195/A/

INIS

Country of Publication
Japan
Country of Input or Organization
Japan
INIS RN
16064734
Subject category
S21: SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS;
Resource subtype / Literary indicator
Non-conventional Literature
Descriptors DEI
BWR TYPE REACTORS; COBALT 60; CORROSION PRODUCTS; NITRIC ACID; PASSIVATION; PIPELINES; RADIOACTIVITY; STAINLESS STEELS; SURFACE PROPERTIES
Descriptors DEC
ALLOYS; BETA DECAY RADIOISOTOPES; BETA-MINUS DECAY RADIOISOTOPES; CARBON ADDITIONS; COBALT ISOTOPES; ENRICHED URANIUM REACTORS; HIGH ALLOY STEELS; HYDROGEN COMPOUNDS; INORGANIC ACIDS; INTERMEDIATE MASS NUCLEI; INTERNAL CONVERSION RADIOISOTO; IRON ALLOYS; IRON BASE ALLOYS; ISOMERIC TRANSITION ISOTOPES; ISOTOPES; MINUTES LIVING RADIOISOTOPES; NITROGEN COMPOUNDS; NUCLEI; ODD-ODD NUCLEI; OXYGEN COMPOUNDS; POWER REACTORS; RADIOISOTOPES; REACTORS; STEELS; THERMAL REACTORS; WATER COOLED REACTORS; WATER MODERATED REACTORS; YEARS LIVING RADIOISOTOPES

Optional Information

Secondary number(s)
JP patent application 57-211431.