EXTENDED FATIGUE LIFE EVALUATION METHODS FOR AGED LWR COMPONENTS

Award Information

Agency: Nuclear Regulatory Commission

Branch: N/A

Contract: N/A

Agency Tracking Number: 1827

Amount: $75,000.00

Phase: Phase II

Program: SBIR

Solicitation Topic Code: N/A

Solicitation Number: N/A

Timeline

Solicitation Year: N/A

Award Year: 1986

Award Start Date (Proposal Award Date): N/A

Award End Date (Contract End Date): N/A

Small Business Information

O'donnell Consulting Engineers

3611 Maplevue Drive

Bethel Park, PA 15102

United States

DUNS: N/A

HUBZone Owned: No

Woman Owned: No

Socially and Economically Disadvantaged: No

Principal Investigator

Name: William J O'donnell
Title: Principal Investigator
Phone: () -

Business Contact

Name: WILLIAM J O'DONNELL
Title: PRESIDENT
Phone: () -

Research Institution

N/A

Abstract

STRESSES DUE TO PRESSURE AND REPEATED THERMAL CYCLING CAUSE PROGRESSIVE MATERIAL DAMAGE DURING THE OPERATION OF LWR COMPONENTS AND PIPING SYSTEMS. THE PRESENT PRO POSED RESEARCH WOULD IMPROVE THE ACCURACY OF EXISTING S- N FATIGUE EVALUATION METHODS BY COMBINING THEM WITH THE ADVANCED TECHNOLOGY OF CRACK PROPAGATION AND FRACTURE MECH ANICS. ENVIRONMENTAL EFFECTS WILL BE INCLUDED IN THE CRACK PROPAGATION DATA USED. WELDMENTS WILL BE INCLUDED BY CONSIDERING RESIDUAL STRESS EFFECTS, COMBINED METALLUR GICAL AND GEOMETRIC NOTCH EFFECTS, EARLY CRACK INITIATION IN THE HEAT AFFECTED ZONE (HAZ), FATIGUE DAMAGE DURING THE WELDING PROCESS AND OTHER EFFECTS NOT INCLUDED IN THE EXIST ING S-N FATIGUE EVALUATION METHODS. THE RESULTING GENERAL METHODS OF EVALUATING THE SAFE EXTENDED FATIGUE LIFE OF AGED COMPONENTS AND PIPING WILL BE QUALIFIED BY COMPARISON WITH OPERATING EXPERIENCE ON ACTUAL HARDWARE INCLUDING RELEVANT NON-NUCLEAR EXPERIENCE.

* Information listed above is at the time of submission. *

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EXTENDED FATIGUE LIFE EVALUATION METHODS FOR AGED LWR COMPONENTS