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Title

RISK ANALYSIS OF THE ISU AGN-201M REACTOR AND CONTROL ROD DRIVE CHANGEOVER

Organization

Department: Nuclear Eng'g & Health Physics

University: Idaho State University College: Science & Engineering Department: Nuclear Eng'g & Health Physics 23

Document Attachments

Resource	Length	Width	Thickness
Paper	0	0	0

Specimen Elements

City

Pocatello

Coverage

Unknown to Unknown

Creator

Wesley Yockey

Publisher

Idaho State University

Type

Thesis

Is Complete

No

Date Published

7/11/2023

Archive

digital

City: Pocatello

Degree

Master

Document Attachments

Abstracts

The current Aerojet General Nucleonics 201 modified (AGN-201m) reactor at Idaho State University (ISU) has operated for 80 years with the current control rod mechanisms which still allows for adequate SCRAMming of the reactor. The original design involves a double leadscrew which causes binding problems and weight problems with the steel chassis. The proposed new design is lighter-weight and more serviceable than the original design by using newer materials and a single leadscrew design. This thesis provides a risk assessment of the new control rod drive mechanism (CRDM) versus the current CRDM and assists in the required documentation submitted to the Nuclear Regulatory Commission (NRC). The reliability analysis with machine learning yielded a result of 1.980E-10 (mean time to failure (MTTF) 3.15E+07) probability of failure of any two of the current CRDMs and 1.170E-14 (MTTF 5.34E+11) probability of failure of any two of the new CRDMs.