ML20132B238

Forwards Safety Evaluation & RAI Re Reactor Bldg Radiation Monitoring Equipment

ML20132B238
Person / Time
Site:	Browns Ferry
Issue date:	12/11/1996
From:	Williams J NRC (Affiliation Not Assigned)
To:	Kingsley O TENNESSEE VALLEY AUTHORITY
Shared Package
ML20132B243	List: ML20132B238 ML20132B270
References
TAC-M89680, TAC-M89681, TAC-M89682, NUDOCS 9612170109
Download: ML20132B238 (3)

Text

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""%4 UNITED STATES 50-%9 { l

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' 5 NUCLEAR REGULATORY COMMISSION I I WASHINGTON, D.C. 20066 0001 h

,,g # December 11, 1996 Mr. Oliver D. Kingsley, Jr.

President, TVA Nuclear and Chief Nuclear Officer Tennessee Valley Authority 6A Lookout Place i

1101 Market Street Chattanooga, Tennessee 37402-2801

SUBJECT:

BROWNS FERRY NUCLEAR PLANT UNITS 1, 2, AND 3 - SAFETY EVALUATION AND REQUEST FOR ADDITIONAL INFORMATION REGARDING REACTOR BUILDING RADIATION MONITORING EQUIPMENT (TAC NOS. M89680, M89681, AND M89682)

Dear Mr. Kingsley:

On April 13, 1993, the NRC staff issued amendments to the operating licenses for the Browns Ferry Nuclear Plant (BFN) Units 1, 2, and 3 which reflected '

replacement of analog components in the reactor building ventilation radiation monitoring (RBVRM) system with digital equipment. As part of its safety evaluation, the staff required the Tennessee Valley Authority (TVA) to perform a survey of electromagnetic interference and radio frequency interference at the site and to submit a report on the survey results to the staff. Interim operation of the digital equipment was accepted pending staff acceptance of the test results.

TVA submitted the requested tast reports on December 23, 1993. The NRC staff requested additional information on this issue on December 8, 1994. TVA responded to this request on April 14, 1995. TVA also provided additional information on July 25, 1996 in response to verbal requests from the staff.

NRC staff conclusions based on information provided by TVA are documented in the enclosed safety evaluation (SE). The SE documents staff acceptance of administrative controls on portable radios and temporary equipment in the areas around the RBVRM sensors. The staff also finds that site surveys done in accordance with MIL-STD-462 to be consistent with commitments accepted by the staff in the SE of April 13, 1993.

' The staff finds that susceptibility testing for radiated magnetic and electric field emissions performed in accordance with MIL STD-462D RS 101 and RS 103, and testing of conducted transient emissions in accordance with IEC 801-5 to be consistent with appropriate standards and practices. Therefore, these tests are acceptable.

As documented in the SE, the staff does not believe that susceptibility testing performed using IEC 801-4 techniques is equivalent to MIL STD-462D CS 114. Therefore, the staff concludes that TVA did not fulfill a commitment made in its letter of March 16, 1993 which described the proposed test program. Therefore, TVA is requested to perform a test consistent with MIL STD-462D CS 114, provide additional justification for use of IEC 801-4, or provide an acceptable alternative. The staff notes that the severity level 9612170109 961211 PDR ADOCK 05000259 k'

P PDR

4 Mr. O. Kingsley, Jr. , specified by MIL STD-462D CS 114 may exceed the environment observed at BFN, j so testing at a lower severity level, including appropriate margin, may be

acceptable. Within 90 days of the date of this letter, TVA is requested to provide a schedule and description of a susceptibility test which will fulfill

the commitment of the March 16, 1993 letter, or additional justification of

the adequacy,of IEC 801-4.,

i l The staff finds that the conclusions expressed in the safety evaluation of 1 April.13,c1993 regarding the acceptability of operations are still valid,

[i 'pending closure of issues associated with the susceptibility testing.

! Please call me at (301)415-1470 if-you have any questions regarding this j topic. .

, Sincerely, 7

j I t-s Original signed by 3 .r ..  ;

- - - <+ ,' Joseph F. Williams, Project Manager j ,

>- . Project-Directorate II-3

,

• Division-of Reactor Projects - I/II

0ffice of Nuclear Reactor Regulation 1

j

Docket Nos. 50-259,'50-260, and'50-.296 l j ,, .

Enclosure:

See next page -

I cc w/ enclosure: See next.page Distribution Docket File-PUBLIC

! BFN Rdg.

1 S. Varga J. Zwolinski

!' OGC ACRS i E. Merschoff, RII

E. Lee j T. Harris-[TLH3] (1tr/SE)

, DOCUMENT NAME: G:\BFN\M89680.RAI 1

To receive a copy of this document, indicate in the box: "C" - Copy without

attachment / enclosure "E" - Copy with attachment / enclosure "N" - No copy j OFFICE P0ll 3/PM /ji , l g, P0ll-3/LA f) () /l BC/ MICE * {4 PO!I 3/D ,) l6l j NAME JWittless / F BClayton X(') M JWermiet FMebdon T;d l DATE 12/ A /96 12/ // /% l/ 12/9/% 12/ l l /96 l

. previous concurrence OFFICIAL RECORD COPY l

j

Mr. Oliver D. Kingsley, Jr. BROWNS FERRY NUCLEAR PLANT

. Tennessee Valley Authority cc:

Mr. O. J. Zeringue, Sr. Vice President Regional Administrator Nuclear Operations U.S. Nuclear Regulatory Commission Tennessee Valley Authority Region II ,

6A Lookout Place 101 Marietta Street, NW., Suite 2900 1 1101 Market Street Atlanta, GA 30323 1 Chattanooga, TN 37402-2801 Mr. Michael J. Morgan Mr. Mark 0. Medford, Vice President Senior Resident Inspector Engineering & Technical Services Browns Ferry Nuclear Plant Tennessee Valley Authority U.S. Nuclear Regulatory Commission 6A Lookout Place 10833 Shaw Road '

1101 Market Street Athens, AL 35611 Chattanooga, TN 37402-2801 ,

Chairman Mr. R. D. Machon, Site Vice President Limestone County Commission Browns Ferry Nuclear Plant 310 West Washington Street Tennessee Valley Authority Athens, AL 35611 P.O. Box 2000 Decatur, AL 35609 State Health Officer Alabama Department of Public Health General Counsel 434 Monrce Street Tennessee Valley Authority Montgomery, AL 36130-1701 ET 10H 400 West Summit Hill Drive Knoxville, TN 37902 Mr. Raul R. Baron, General Manager Nuclear Assurance and Licensing Tennessee Valley Authority 4J Blue Ridge 1101 Market Street Chattanooga, TN 37402-2801 Mr. Eugene Preston, Plant Manager Browns Ferry Nuclear Plant Tennessee Valley Authority P.O. Box 2000 Decatur, AL 35609 Mr. Pedro Salas, Manager Licensing and Industry Affairs Tennessee Valley Authority 4J Blue Ridge 1101 Market Street Chattanooga, TN 37402-2801 Mr. Timothy E. Abney, Manager Licensing and Industry Affairs Browns Ferry Nuclear Plant Tennessee Valley Authority P.O. Box 2000 Decatur, AL 35609