Structural integrity evaluation of high activity moderator system evaporator

Thumbnail image of item number 1 in: 'Structural integrity evaluation of high activity moderator system evaporator'.
Thumbnail image of item number 2 in: 'Structural integrity evaluation of high activity moderator system evaporator'.
Thumbnail image of item number 3 in: 'Structural integrity evaluation of high activity moderator system evaporator'.
Thumbnail image of item number 4 in: 'Structural integrity evaluation of high activity moderator system evaporator'.
Showing 1-4 of 34 pages in this report.

PDF Version Also Available for Download.

Description

The High Activity Moderator (HAM) system is wanted in a batch mode in which the evaporator tank is filled with 70{degrees}F cold moderator (D{sub 2}O) every 4 hours. This operation induces thermal shock to the wall of the tank. Thermal and structural analyses are performed to evaluate the impact of this thermal shock on the 220{degrees}F hot evaporator tank walls. Conservative thermal models are analyzed. Case 1 analyzes a 4 in. wide strip of D{sub 2}O running down the tank walls during the filling process and Case 2 analyzes the tank being filled instantly with 70{degrees}F D{sub 2}O. It is … continued below

Physical Description

32 p.

Creation Information

Gupta, N. K. May 1, 1994.

Context

This report is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided by the UNT Libraries Government Documents Department to the UNT Digital Library, a digital repository hosted by the UNT Libraries. More information about this report can be viewed below.

Who

People and organizations associated with either the creation of this report or its content.

Author

Sponsor

Publisher

Provided By

UNT Libraries Government Documents Department

Serving as both a federal and a state depository library, the UNT Libraries Government Documents Department maintains millions of items in a variety of formats. The department is a member of the FDLP Content Partnerships Program and an Affiliated Archive of the National Archives.

About | Browse this Partner

Contact Us

Corrections Questions

What

Descriptive information to help identify this report. Follow the links below to find similar items on the Digital Library.

Description

The High Activity Moderator (HAM) system is wanted in a batch mode in which the evaporator tank is filled with 70{degrees}F cold moderator (D{sub 2}O) every 4 hours. This operation induces thermal shock to the wall of the tank. Thermal and structural analyses are performed to evaluate the impact of this thermal shock on the 220{degrees}F hot evaporator tank walls. Conservative thermal models are analyzed. Case 1 analyzes a 4 in. wide strip of D{sub 2}O running down the tank walls during the filling process and Case 2 analyzes the tank being filled instantly with 70{degrees}F D{sub 2}O. It is found that Case 1 results in larger temperature gradients are then input into the structural model for calculating the thermal stresses. The structural analysis shows that the maximum stress intensity due to combined pressure and thermal loading is about 17240 psi which is well below the yield stress (21000 psi) of the evaporator tank wall material, stainless steel 304L. The fatigue life is evaluated in accordance with the criteria given in ASME Code, Section VIII. It is found that at the stress level of 17240 psi plus any residual stresses that might be present at the welded attachments to the tank wall, the fatigue life is about 4{times}10{sup 6} cycles. If the evaporator tank is filled every 4 hours, the tank fatigue life is well above the anticipated batch operation period of 2 years.

Physical Description

32 p.

Notes

OSTI as DE94016535; Paper copy available at OSTI: phone, 865-576-8401, or email, reports@adonis.osti.gov

Source

  • Other Information: PBD: May 1994

Language

Item Type

Identifier

Unique identifying numbers for this report in the Digital Library or other systems.

Collections

This report is part of the following collection of related materials.

Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

About | Browse this Collection

What responsibilities do I have when using this report?

Digital Files

When

Dates and time periods associated with this report.

Creation Date

  • May 1, 1994

Added to The UNT Digital Library

  • Nov. 28, 2018, 2:33 p.m.

Description Last Updated

  • Jan. 7, 2019, 4:44 p.m.

Usage Statistics

When was this report last used?

Yesterday: 0
Past 30 days: 0
Total Uses: 3
More Statistics

Interact With This Report

Here are some suggestions for what to do next.

Start Reading

Thumbnail image of item number 1 in: 'Structural integrity evaluation of high activity moderator system evaporator'.
Thumbnail image of item number 2 in: 'Structural integrity evaluation of high activity moderator system evaporator'.
Thumbnail image of item number 3 in: 'Structural integrity evaluation of high activity moderator system evaporator'.
Thumbnail image of item number 4 in: 'Structural integrity evaluation of high activity moderator system evaporator'.

PDF Version Also Available for Download.

Citations, Rights, Re-Use

International Image Interoperability Framework

IIF Logo

We support the IIIF Presentation API

Links for Robots

Helpful links in machine-readable formats.

Archival Resource Key (ARK)

International Image Interoperability Framework (IIIF)

Metadata Formats

Images

URLs

Stats

Gupta, N. K. Structural integrity evaluation of high activity moderator system evaporator, report, May 1, 1994; Aiken, South Carolina. (https://digital.library.unt.edu/ark:/67531/metadc1386815/: accessed April 19, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.

Back to Top of Screen