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Title: Boiling water reactor radiation shielded Control Rod Drive Housing Supports

Abstract

The Control Rod Drive (CRD) mechanisms are located in the area below the reactor vessel in a Boiling Water Reactor (BWR). Specifically, these CRDs are located between the bottom of the reactor vessel and above an interlocking structure of steel bars and rods, herein identified as CRD Housing Supports. The CRD Housing Supports are designed to limit the travel of a Control Rod and Control Rod Drive in the event that the CRD vessel attachement went to fail, allowing the CRD to be ejected from the vessel. By limiting the travel of the ejected CRD, the supports prevent a nuclear overpower excursion that could occur as a result of the ejected CRD. The Housing Support structure must be disassembled in order to remove CRDs for replacement or maintenance. The disassembly task can require a significant amount of outage time and personnel radiation exposure dependent on the number and location of the CRDs to be changed out. This paper presents a way to minimize personal radiation exposure through the re-design of the Housing Support structure. The following paragraphs also delineate a method of avoiding the awkward, manual, handling of the structure under the reactor vessel during a CRD change out.

Authors:
;  [1]
  1. ABB Combustion Engineering Nuclear Operations, Windsor, CT (United States)
Publication Date:
Research Org.:
Nuclear Regulatory Commission, Washington, DC (United States). Div. of Regulatory Applications; Brookhaven National Lab., Upton, NY (United States)
OSTI Identifier:
54688
Report Number(s):
NUREG/CP-0143; BNL-NUREG-52440; CONF-940505-
ON: TI95008770; TRN: 95:012722
Resource Type:
Conference
Resource Relation:
Conference: 3. international workshop on implementation of ALARA at nuclear power plants, Long Island, NY (United States), 8-11 May 1994; Other Information: PBD: Mar 1995; Related Information: Is Part Of Proceedings of the Third International Workshop on the implementation of ALARA at nuclear power plants; Khan, T.A. [comp.] [Brookhaven National Lab., Upton, NY (United States)]; Roecklein, A.K. [Nuclear Regulatory Commission, Washington, DC (United States). Div of Regulatory Applications]; PB: 810 p.
Country of Publication:
United States
Language:
English
Subject:
21 NUCLEAR POWER REACTORS AND ASSOCIATED PLANTS; 22 NUCLEAR REACTOR TECHNOLOGY; BWR TYPE REACTORS; CONTROL ROD DRIVES; SUPPORTS; SHIELDING; ALARA; REDUCTION; OCCUPATIONAL EXPOSURE; ELECTROMAGNETIC RADIATION

Citation Formats

Baversten, B., and Linden, M.J. Boiling water reactor radiation shielded Control Rod Drive Housing Supports. United States: N. p., 1995. Web.
Baversten, B., & Linden, M.J. Boiling water reactor radiation shielded Control Rod Drive Housing Supports. United States.
Baversten, B., and Linden, M.J. Wed . "Boiling water reactor radiation shielded Control Rod Drive Housing Supports". United States. https://www.osti.gov/servlets/purl/54688.
@article{osti_54688,
title = {Boiling water reactor radiation shielded Control Rod Drive Housing Supports},
author = {Baversten, B. and Linden, M.J.},
abstractNote = {The Control Rod Drive (CRD) mechanisms are located in the area below the reactor vessel in a Boiling Water Reactor (BWR). Specifically, these CRDs are located between the bottom of the reactor vessel and above an interlocking structure of steel bars and rods, herein identified as CRD Housing Supports. The CRD Housing Supports are designed to limit the travel of a Control Rod and Control Rod Drive in the event that the CRD vessel attachement went to fail, allowing the CRD to be ejected from the vessel. By limiting the travel of the ejected CRD, the supports prevent a nuclear overpower excursion that could occur as a result of the ejected CRD. The Housing Support structure must be disassembled in order to remove CRDs for replacement or maintenance. The disassembly task can require a significant amount of outage time and personnel radiation exposure dependent on the number and location of the CRDs to be changed out. This paper presents a way to minimize personal radiation exposure through the re-design of the Housing Support structure. The following paragraphs also delineate a method of avoiding the awkward, manual, handling of the structure under the reactor vessel during a CRD change out.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1995},
month = {3}
}

Conference:
Other availability
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