ML20052B263
| ML20052B263 | |
| Person / Time | |
|---|---|
| Site: | Browns Ferry  |
| Issue date: | 04/26/1982 |
| From: | Mills L TENNESSEE VALLEY AUTHORITY |
| To: | Vassallo D Office of Nuclear Reactor Regulation |
| References | |
| RTR-NUREG-0737, RTR-NUREG-737, TASK-2.F.1, TASK-TM NUDOCS 8204300229 | |
| Download: ML20052B263 (3) | |
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4 TENNESSEE VALLEY AUTHORITY CHATTANOOGA. TENNESSEE 37401 400 Chestnut Street Tower II O
g April 26, 1982 HECElVED.,
g7 APR 2919825 f Director of Licensing N E M is x m casess I
Attention:
Mr. Domenic B. Vassallo, Chief "gNM
/
Operating Reactors Branch No. 2 U.S. Nuclear Regulatory Comm' sion Washington, DC 20555 b
f
Dear Mr. Vassallo:
In the lhtter of the
)
Docket Nos. 50-259 Tennessee Valley Authority
)
50-260 50-296 Your letter to H. G. Parris dated March 22, 1982 requested that TVA provide t.dditional information regarding our responses to NUREG-0737 items II.F.1.4, II.F.1.5, and II.F.1.6 for Browns Ferry Nuclear Plant. Enclosed are our responses to the questions listed in the enclosure to the March 22, 1982 letter.
Very truly yours, TENNESSEE VALLEY AUTHORITY
\\
L. M. Mills, Manager Nuclear Licensing Subscrib nd worn to be re me this day of
/11<
1982.
G 4 a A t a 6 /. W 1 9 Notary Public My Commission Expires Enclosure cc:
U.S. Nuclear Reguletory Commission Region II ATTN: James P. O'Reilly, Regional Administrator 101 Marietta Street, Suite 3100 Atlanta, Georgia 30303 82043069 M
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An Equal Opportunity Employer
ENCLOSURE NUREG-0737 ITEMS II.F.1.4, II.F.1.5, AND II.F.1.6 REQUEST FOR ADDITIONAL INFORMATION BROWNS FERRY NUCLEAR PLANT The following are our responses to the questions provided as'the enclosure to D. D. Vassallo's March 22, 1982 letter to H. G. Parris.
1.
In your submittal of December 23, 1980 you did not indicate that you plan to take exception to any of the technical requirements of NUREG-0737. Are you planning any exceptions of which we are not aware?
Resoonse The Rosemount 1153 series transmitters used in containment pressure and water level monitoring loops were purchased in December 1980.
They are qualified in IEEE 323-1971. Transmitters qualified to IEEE 323-1974 were not available for the required delivery date of January 1981. Maximum error of transmitters under LOCA conditions is five percent upscale.
2.
(II.F.1.4) What is the accuracy of your pressure monitor?
State this for both the indicator and the recorder.
Response
Indicator - Westinghouse VX252: 1 1-1/2 percent of full scale Recorder - L&N Speedmax 100: 1 0.5 percent of span Transmitters - Rosemount 1153-GA-5 and -GA-8:
1 0.25 percent of span 3
(II.F.1.4) What is the time response of your pressure monitor? State this for both the indicator and the recorder.
I
Response
Indicator - Westinghouse VX252: 2-1/2 second full scale Recorder - L&N Speedmax 110:
1 second full scale Transmitter - Rosemount 1153:
0.2 second to 63 percent of final value at 1000F 4
(II.F.1.5) What is the accuracy of your water level monitor?
State this for both the wide range instrument and the narrow range instrument.
4 Resoonse Note: Only one range required on BWRs.
Indicator - Westinghouse VX252:
1 1-1/2 percent of full scale Recor der - L&N Speedmax 100:
1 0.5 percent of full scale Tran mitters - Rosemount 1153-DA-5:
3 0.25 percent of full scale
- e g
~2-5.
(II.F.1.6) Where are the hydrogen sample ports placed?
Response
.At the highest point inside torus and well above biological shield in drywell.
Exact locations: Elevation - 631 feet 3 inches in drywell Azimuths 500 and 2400 Elevation - 552 feet 5 inches in torus above penetrations X229D and X229K Drawing
References:
47W600-197, -198 6.
(II.F.1.6) Is there any obstruction which would prevent hydrogen from the core from reaching the hydrogen sample ports reasonably quickly?
Response
No.
7.
(II.F.1.6) What is the accuracy of your hydrogen monitor?
Response
Indicator - Westinghouse HX252: 2 1-1/2 percent of full scale H2 Analyzer - Hayes Republic: 12 percent of full scale.
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