Inservice Inspection Programs for Prestressed Concrete Containment Structures (Generic Letter 80-101)
GL80101
UNITED STATES
NUCLEAR REGULATORY COMMISSION
WASHINGTON, D.C. 20555
November 25, 1980
TO OPERATING REACTORS WITH PRESTRESSED CONCRETE CONTAINMENT STRUCTURES
Gentlemen:
SUBJECT: Inservice Inspection Programs for Prestressed Concrete Containment
Structures
The Office of Standards Development is in the process of awarding a contract
to Oak Ridge National Laboratories to compile and review the containment
inservice inspection (ISI) records of all operating nuclear power plants
with greased prestressing tendons. The purpose of this contract is to assess
the data accumulated to date on the ISI of greased tendons in containments,
and to determine the effectiveness of these programs.
The contractor will review Regulatory Guides 1.35 and 1.35.1 and the
relevant draft of the ASME Section XI Working Group on ISI of Concrete
Pressure Components. In addition, the contractor is being asked to visit a
few sites to observe the ISI of greased prestressing tendons. The contractor
will then be asked to make recommendations to improve the existing programs.
With this letter, we are requesting voluntary submissions of existing data,
summaries and records of the ISI tests of containments with greased pre-
stressing tendons, which should contain the following information:
a. Sample size and method of sample selection,
b. Procedure for lift-off testing,
c. Procedure for testing of corrosion inhibiter (i.e., grease),
d. Procedure for tendon material testing,
e. Acceptance and rejection criteria used for the test program, and
f. Repair, replacement and corrective actions.
Information already reported to the NRC need not be included. We also
welcome any comments, observations or suggestions you may consider relevant
to this effort. In your response please indicate any ISI tests planned
between December 1980 and June 1981 that our contractor could observe.
.
- 2 - November 25, 1980
The above information should be sent to, Chief, Structures and Components
Standards Branch, Office of Standards Development, U.S. Nuclear Regulatory
Commission, Washington. D.C. 20555 by December 31, 1980. For further
information concerning this project, contact Hans Ashar at (301) 443-5997.
Sincerely,
Darrell G. Eisenhut, Director
Division of Licensing
Office of Nuclear Reactor Regulation
Enclosure:
List of plants with Prestressed Concrete Containment Structures
.
NUCLEAR POWERS PLANTS WITH PRESTRESSED
CONCRETE CONTAINMENT STRUCTURES
1. Arkansas Nuclear 1 Arkansas Power & Light Co.
2. Calvert Cliffs 1 & 2 Baltimore Gas & Electric
3. Fort Calhoun 1 Omaha Public Power District
4. Ginna N.P.S. Rochester Gas & Electric
5. Millstone N.P. 2 Connecticut Light & Power Co.
6. Oconee N.S. 1, 2 & 3 Duke Power Company
7. Palisades Consumers Power Company
8. Point Beach 1 & 2 Wisconsin Electric & Power
Wisconsin & Michigan Power
9. Rancho Seco 1 Sacramento Municipal Utility
10. Robinson. H.B. 2 Carolina Power & Light
11. Trojan Nuclear Plant Portland General Electric
12. Turkey Point 3 & 4 Florida Power & Light
13. Zion Station 1 & 2 Commonwealth Edison Company
14. Crystal River 3 Florida Power Company
15. J. M. Farley N. P. 1 & 2 Alabama Power Company
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