ML20116C354

Responds to Verbal Requests by J Williams During 960118 Telephone Conference Concerning Rbvrm Equipment

ML20116C354
Person / Time
Site:	Browns Ferry
Issue date:	07/25/1996
From:	Salas P TENNESSEE VALLEY AUTHORITY
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
Shared Package
ML20116C355	List: ML20116C354 ML20116C370
References
TAC-M84161, TAC-M84162, TAC-M84163, NUDOCS 9607310108
Download: ML20116C354 (5)

Text

-

nn Tennessee Valley Authority, Post Office Box 2000, Decatur. Alabama 35609 JUL 2 51996

)

l U.S.

Nuclear Regulatory Commission ATTN:

Document Control Desk Washington, D.C.

20555 Gentlemen:

In the Matter Of

)

Docket Nos. 50-259 Tennessee Valley Authority

)

50-260 50-296 BROWNS FERRY NUCLEAR PLANT (BFN) - RESPONSE TO NRC REQUESTS REGARDING THE UPGRADED REACTOR BUILDING VENTILATION RADIATION MONITORING (RBVRM) EQUIPMENT (TAC NOS. M84161, M84162, AND M84163)

The purpose of this letter is to respond to verbal requests made by NRC Project Manager, Joe Williams, during a January 18, 1996, telephone conference call concerning the RBVRM equipment.

There were two NRC requests:

1.

Provide certification that the BFN RBVRM chassis power supplies are qualified to International Electrotechnical Commission (IEC) Standard 801-5 Level 2, per generic Nuclear Measurement Analysis and Control (NUMAC) Leak Detection Monitor (LDM) testing.

2.

Explain how the Fourier transform to convert the time domain IEC 801-4 test waveform to a frequency domain representation was performed.

The enclosure provides TVA's answers to the above NRC requests.

There are no commitments contained in this letter.

If you have questions, please telephone me at (205) 729-2636.

Si er ly, Pe'dro Salas Manager of Site Licensing Enclosure cc:

See page 2 9607310100 96'0725 PDR ADOCK 05000259 l

p PDR v

,U.S., Nuclear Regulatory Commission Page 2-JUL 251996 Enclosure-cc (Enclosure):

Mr. Mark S.

Lesser, Branch Chief U.S.. Nuclear Regulatory Commission Region II 101 Marietta Street, NW, Suite 2900 Atlanta, Georgia 30323-NRC Resident Inspector Browns Ferry Nuclear Plant 10833 Shaw Road Athens, Alabama 35611 Mr.

J.

F. Williams, Project Manager U.S.

Nuclear Regulatory Commission One White Flint, North 11555 Rockville Pike Rockville, Maryland 20852-I

ENCLOSURE TENNESSEE VALLEY AUTHORITY BROWNS FERRY NUCLEAR PLANT (BFN)

UNITS 1, 2,

AND 3 BFN - RESPONSE TO NRC REQUESTS REGARDING THE UPGRADED i

REACTOR BUILDING VENTILATION RADIATION MONITORING (RBVRM)

EQUIPMENT (TAC NOS. M84161, M84162, AND M84163) i Purpose The purpose of this enclosure is to provide TVA's response to NRC l

requests regarding the Upgraded RBVRM Equipment.

The following is a restatement of the NRC requests followed by TVA's response.

NRC Request Number 1 Provide certification that the BFN RBVRM chassis power supplies are qualified to International Electrotechnical Commission (IEC) 801-5 Level 2, per generic Nuclear Measurement Analysis and Control (NUMAC) Leak Detection Monitor (LDM) testing.

{

TVA's Response To NRC Request Number 1 TVA is providing in Attachment 1, certification that the BFN RBVRM chassis power supplies are qualified to IEC 801-5 Level 2, per generic NUMAC Leak Detection Monitor (LDM) testing.

NRC Request Number 2 Explain how the Fourier transform to convert the time domain IEC Standard 801-4 test waveform to a frequency domain representation was performed.

TVA's Response To NRC Request Number 2 contains the explanation of how the Fourier transform to convert the time domain IEC Standard 801-4 test waveform to a frequency domain representation.

ATTACHMENT 1

.~

"##### ""D W79 960207-001 2

i w

1 February 7.1996 BFSE 96-006 Mr. H. L. Williams Engineering and Materials Manager j.

Tennessee Valley Authority i

Browns Ferry Nuclear Plant 3

P. O. Box 2000. EDB-1 A Decatur, AL 35609 i

1 l

Subject:

NUMAC RVBRM IEC 801-5 Qualification Basis a

Dear Mr. Williams:

i j

GENE received a request from your staff to provide information regarding qualification of the NUMAC RVBRM. Mr. Dave Reigel(GENE) has reviewed that request and has provided the j

attached letter in response to those questions.

If you have questions regarding this information or additional information is required please contact me.

/

/.

/

\\

Dale E. Porter Engineering Manager (205) 729-7452 cc:

G. Nelson, PMB-1 A D. Burrell, EDB-1F

c. _ -

Letterbook File RIMS, WT 3 B-K

~._ -

j GE. Nuclear Energy San Jose, California February 1,1996 cc: DRF A00-02506-5 To:

Dale Porter i

GE Site Engineering Manager Browns Ferry Nuclear Plant i

SUBJECT:

NUMAC RVBRM IEC 801-5 Qualification Basis

References:

1.

Letter, Chuck Wilson to David Burrell, September 29,1993.

j 2.

Memo, Gaylon Hicks to Dave Reigel, January 22,1996.

Reference 1 identified an IEC 801-5 qualification level of Level 2 for the Browns Ferry -

NUMAC RBVRM as delivered, and cited test of a NUMAC Leak Detection Monitor i

(LDM) as the basis. Reference 2 requested confirmation that the power supply for the Browns Ferry RBVRM is the same as that in the LDM actually tested.

I have reviewed the test report and the documents for the LDM tested compared to the Browns Ferry RBVRM *, and confirmed that the power supplies and the suppression circuitry of the LDM chassis tested are the same as in the RBVRM. Therefore, the tested t

configuration for the power input circuit is the same as that for the Browns Ferry RBvRM.

Please provide this information to TVA as requested in Reference 2.

Regards, b

Dave Re (408) 925-2094

• Ref:

GE Dwg.105El106(tested LDM)

GE Dwg.10$E1002 (BF RBVRM)

DRF A00-025064, Vol. 2.