ML20126E994

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Containment Leak Rate Testing Investigations, Monthly Progress Rept for Nov 1982
ML20126E994
Person / Time
Site: Millstone, Monticello, Dresden, Peach Bottom, Browns Ferry, Oconee, Nine Mile Point, Palisades, Kewaunee, Point Beach, Oyster Creek, Cooper, Pilgrim, Prairie Island, Vermont Yankee, Haddam Neck, Duane Arnold, Robinson, Yankee Rowe, Maine Yankee, Quad Cities, Humboldt Bay, La Crosse, Big Rock Point, Zion, Fort Calhoun, 05000000
Issue date: 12/07/1982
From: Dougan J
OAK RIDGE NATIONAL LABORATORY
To: Arndt G
NRC OFFICE OF NUCLEAR REGULATORY RESEARCH (RES)
Shared Package
ML20126E434 List:
References
CON-FIN-B-0489, CON-FIN-B-489, FOIA-85-143 NUDOCS 8506170281
Download: ML20126E994 (3)


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OAK RIDGE NATIONAL LABORATORY OPERATED BY j UNION CARBIDE CORPORATION i NUCLEAR DIVISION O

POST OFFICE BOX Y OAK RIDGE. TENNESSEE 37830 December 7, 1982 Mr. Gunter Arndt Mechanical / Structural Engineering Branch l

Division of Engineering Technology NL 238 Office of Nuclear Regulatory Research U.S. Nuclear Regulatory Commission Washington, DC 20555 ,

Dear Gunter:

This letter stanmarizes our progress on the Containment Leak Rate Testing Investigations (Fin. No. BO489) Program for the month of November 1982.

4 Technical Highlights f

An evaluation of the formulation of the leak rate equation proposed by EXTRAN was initiated. The fundamental difference between the EXTRAN equation and the ANSI /ANS equation is in the determination of the tempera-ture term. Both equations provide an approximation so an evaluation was begun to determine if the differences were significant.

Only one set of leak rate data has been used in the evaluation so far, but certain trends are observable. In every case but one the difference

' between the temperature terms in the two equations was approximately two percent or less. In one case the difference was almost twenty percent, but the temperature terms were so small that the twenty percent difference had a negligible effect on the leak rate. In fact, it seems that the only time a significant difference is likely to occur in the leak rates will be when the leak rates are extremely small (approaching zero). These observa-tions are preliminary and may change as additional data are evaluated.

A search of the Nuclear Safety Information Center (NSIC) computer file has been conducted to identify the License Event Reports (LERs) per-

< taining to Type A leak rate tests. Copies of the LERs will be obtained soon and reviewed. An additional search of the NSIC computer file will be conducted at a later time to identify LERs pertaining to Type B and C leak rate tests, p p p -ts -lO

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December 7, 1982 Mr. Gunter Arndt 2 Due to conflicts in scheduling, one plant visit to observe leak rate testing was canceled. However, additional plants that will be conducting tests in the near future have been identified and will be used to replace any canceled visits.

On November 30, 1982, a meeting was held with Z. V. Reytblatt of EXTRAN, Inc. , in Chicago, Illinois, to discuss the previously mentioned formulation of the leak rate equation and to identify areas in which he might be of some assistance. No decision has been reached regarding his assistance .

Also, on December 1, 1982, a meeting was held with personnel of Wiss, Janney, Elstner, and Associates in Northbrook, Illinois, concerning their experience in leak rate testing of containments.

Expenditures l Expenditures under this program are shown below.

May June July Aug. Sept. Oct. Nov.

Expenditure ($K) 0.1 2.8 0 0.1 4.0 7.2 9.0*

Cumulative 0.1 2.9 2.9 3.0 7.0 14.2 23.2*

(SK)

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Sincerely, E-J. R. Dougan JRD:ege cc: D. J. Naus

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