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Title: Between-cycle laser system for depressurization and resealing of modified design nuclear fuel assemblies

Abstract

A laser beam is used to puncture fuel cladding for release of contained pressurized fission gas from plenum sections or irradiated fuel pins. Exhausted fission gases are collected and trapped for safe disposal. The laser beam, adjusted to welding mode, is subsequently used to reseal the puncture holes. The fuel assembly is returned to additional irradiation or, if at end of reactivity lifetime, is routed to reprocess. The fuel assembly design provides graded cladding lengths, by rows or arrays, such that the cladding of each component fuel element of the assembly is accessible to laser beam reception.

Inventors:
 [1]
  1. (Richland, WA)
Issue Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
OSTI Identifier:
864093
Patent Number(s):
4309250
Assignee:
United States of America as represented by United States (Washington, DC) PNNL
DOE Contract Number:  
E(45-1)-2170
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
between-cycle; laser; depressurization; resealing; modified; design; nuclear; fuel; assemblies; beam; puncture; cladding; release; contained; pressurized; fission; gas; plenum; sections; irradiated; pins; exhausted; gases; collected; trapped; safe; disposal; adjusted; welding; mode; subsequently; reseal; holes; assembly; returned; additional; irradiation; reactivity; lifetime; routed; reprocess; provides; graded; lengths; rows; arrays; component; element; accessible; reception; fuel cladding; fuel assemblies; fuel element; nuclear fuel; laser beam; fuel assembly; fuel pins; irradiated fuel; design provides; fission gas; safe disposal; assembly design; fission gases; /376/976/

Citation Formats

Bradley, John G. Between-cycle laser system for depressurization and resealing of modified design nuclear fuel assemblies. United States: N. p., 1982. Web.
Bradley, John G. Between-cycle laser system for depressurization and resealing of modified design nuclear fuel assemblies. United States.
Bradley, John G. Fri . "Between-cycle laser system for depressurization and resealing of modified design nuclear fuel assemblies". United States. https://www.osti.gov/servlets/purl/864093.
@article{osti_864093,
title = {Between-cycle laser system for depressurization and resealing of modified design nuclear fuel assemblies},
author = {Bradley, John G.},
abstractNote = {A laser beam is used to puncture fuel cladding for release of contained pressurized fission gas from plenum sections or irradiated fuel pins. Exhausted fission gases are collected and trapped for safe disposal. The laser beam, adjusted to welding mode, is subsequently used to reseal the puncture holes. The fuel assembly is returned to additional irradiation or, if at end of reactivity lifetime, is routed to reprocess. The fuel assembly design provides graded cladding lengths, by rows or arrays, such that the cladding of each component fuel element of the assembly is accessible to laser beam reception.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1982},
month = {1}
}

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