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Overpressurization Test of a 1:4-Scale Prestressed Concrete Containment Vessel Model (NUREG/CR-6810)

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Publication Information
Abstract

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Introduction (181 KB)
Chapter 1 (701 KB)
Chapter 2 (22.0 MB)
Chapter 3 (6.9 KB)
Chapter 4 (1.3 KB)
Chapter 5 (20.9 MB)
Chapter 6 (63 KB)
Chapter 7 (63 KB)
Appendix A (4.5 MB)
Appendix B (1.4 MB)
Appendix C (140 KB)
Appendix D (396 KB)
Appendix E (1.9 MB)
Appendix F (436 KB)
Appendix G (147 KB)
Appendix H (333 KB)
Appendix I (210 KB) *
Appendix J (139 KB)
Appendix K (28 MB)
Appendix L (51.9 MB)

* An index to the Data list, which is larger than 3 MB, is provided in Appendix I. Those desiring the complete Data CD can order the CD version of the report (which contains two discs) by contacting: DISTRIBUTION.Resource@nrc.gov.

Publication Information

Manuscript Completed: March 2003
Date Published: March 2003

Prepared by
M.F. Hessheimer, E.W. Klamerus,
L.D. Lambert, G.S. Rightley,
R.A. Dameron*

Sandia National Laboratories
Operated by Sandia Corporation for the
U.S. Department of Energy
Albuquerque, NM 87185

*ANATECH Corporation
5435 Oberlin Drive
San Diego, CA 92121

Prepared for
Nuclear Power Engineering Corporation
Systems Safety Department
Tokyo 105, Japan
under Fia DE-F104-91-AL73734

NUPEC Project Manager: S. Shibata

Division of Engineering Technology
Office of Nuclear Regulatory Research
U.S. Nuclear Regulatory Commission
Washington, DC 20555-0001
NRC Job Code Y6131

NRC Project Manager: J.F. Costello

Availability Notice

Abstract

The Nuclear Power Engineering Corporation (NUPEC) of Japan and the U.S. Nuclear Regulatory Commission (NRC), Office of Nuclear Regulatory Research, cosponsored and jointly funded a Cooperative Containment Research Program at Sandia National Laboratories (SNL) from July 1991 through December 2002. As part of this program, a 1:4 scale model of a prestressed concrete containment vessel (PCCV) was constructed and pressure tested to failure. The prototype for the model is the containment building of Unit 3 of the Ohi Nuclear Power Station in Japan. The design accident pressure, P_d, of both the prototype and the model is 0.39 MPa (57 psi). The objectives of the PCCV model test were to simulate some aspects of the severe accident loads on containment vessels, observe the model failure mechanisms, and obtain structural response data up to failure for comparison with analytical models.

The PCCV model was designed and constructed by NUPEC and its Japanese contractors, Mitsubishi Heavy Industries, Obayashi Corp., and Taisei Corp. SNL designed and installed the instrumentation and data acquisitions systems and conducted the overpressurization tests. ANATECH Consulting Engineers conducted the pre- and posttest analyses of the model under contract to SNL.

Nearly 1500 transducers were installed on the PCCV model to monitor displacements, liner, rebar, concrete and tendon strains and tendon anchor forces. This instrumentation suite was augmented by the Soundprint^® acoustic monitoring
system, video, and still photography.

Low pressure testing, including a Structural Integrity Test to 1.125 P_d, and an Integrated Leak Rate Test at 0.9 P_d, was conducted in September, 2000. The Limit State Test (LST) of the model was conducted on September 27-28, 2000 by slowly pressurizing the model using nitrogen gas. A leak, presumably through a tear in the liner, was first detected at a pressure of 2.5 P_d and a leak rate of 1.5% mass/day was estimated. The test was terminated when the model reached a pressure of 3.3 P_d. At this pressure, the leak rate was nearly 1000% mass/day, exceeding the capacity of the pressurization system. Posttest inspections revealed 26 tears in the 1.6mm (1/16") steel liner as the source of the leaks.

Since only limited damage and inelastic response occurred during the LST, the interior was resealed with an elastomeric membrane. The PCCV was then filled nearly full with water and repressurized on November 14, 2001. This Structural Failure Mode Test reached a maximum pressure of 3.6 P_d when the model ruptured violently by failure of the prestressing tendons and then the reinforcing steel.

The resulting data from all the tests are provided for comparison with pretest and posttest analyses.