ML18025B685
| ML18025B685 | |
| Person / Time | |
|---|---|
| Site: | Browns Ferry  |
| Issue date: | 11/18/1981 |
| From: | Mills L TENNESSEE VALLEY AUTHORITY |
| To: | Ippolito T Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 8111240566 | |
| Download: ML18025B685 (4) | |
Text
TER-C5506-59/62 SE= Vi"L" iEUTHOWe
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CPA.Tie'e, hate e.SSE 400 Chestnut Street Tower II Novemb/r 18, 1981 Director of Licensing Attention:
Mr. Thomas A. Ippolito, Chief Operating Reaotors Branch No. 2 U.S. Nuolear Regulatory Commission Washington, DC 20555
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Dear Mr. Ippolito:
In the Matter of the
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Tennessee VaLley Authority
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Dooket No. 50>>259 50-260 50 296 Your letter to H. G. Parris dated Ootober 2, 1981 requested that TVA provide additional information regarding proposed technical specifics cations for scram discharge volume surveillanoe requirements (TVA BFNP TS 153).
We have reviewed the Franklin Ress'arch Center request which was provided as an enclosure to your October 12, 1981 letter and are enclosing our response to the three items identified as requiring additional information.
Very truly yours, TENNESSEE VALLEY AUTHORITY
. Mills, Manager Nuclear Regulation and Safety Subscribed..and sworn to b ore se sees ~~
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Notary Public My Casatssfaa Espfses 0 S ZW Enolosure 1981 ~
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PDR Ill Franklin Research Center ADivbked The Fysnk5n Income C-1
TER C5506-59ot 62 ENCLOSURE REQUEST FOR ADDITIONAL INFORMATION BRONNS FERRY NUCLEAR PLANT TVA BFNP TS 153 In response to your letter dated October 2, 1981 to H. G. Parris which transmitted Franklin Research Center's (FRC) request for information regarding TS 153, the FRC requests and eaoh request's resolution are identified below.
Item Provide a reference to that section of the Technical Specificatiohs for Browns Ferry Nuclear Power Station Units 1, 2, and 3 which indicates that the reaotor protection system SDV water level-high consists of 2 OPERABLE channels containing two limit switches per trip system, for a total of 4 OPERABLE channels containing 4 limit switches per two trip system, making 1-out-of-2 taken twice. logic.
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Browns Ferry Technical Specification Section 3.1 in con)unction with Table 3.1.A and Note 1 to Table 3.1.A indicate that the SDV water level high reactor scram function consists of four operable channels containing four switches for two trip systems, making 1-out-of-2 twice logic.
Item 1.
Provide a reference to the pages of the Technical Specifications where CHANNEL CALIBRATION operations eaoh refueling outage is specified, or 2.
Provide technical bases why the CHANNEL CALIBRATION operations each refueling outage should not be performed.
~nee ones Browns Ferry Technical Specifications Table 4.1.B and Note 5 to that table require physical inspection and actuation of each channel once each operating cyole.
Physical aotuation upon the presence of liquid at the switch serves the purpose of a calibration.
(l(l Franklin Research Center A Dlvlsland The FrarhÃn Institute C-2
TERM5506-59/62 Item Since the number of the operable channels per trip function is less than requested in the Ãodel Technioal Specifications, provide technical bases for it.
~Res ons8 Browns Ferry Technical Specification Table 3.2.C and Note 1 to this table require that there shall be two operable or tripped channels for each funotion.
There is one switch per trip system with two trip systems.
One of these switches may be inoperable for up to seven days while remaining in the untripped condition.
These seven days are Justified since the other operable ohannel must be funotionally tested daily thereafter.
Note 12 of Table 3.2.C allows this function to be bypassed in shutdown on refuel mode.
In these modes, control rod withdrawal is limited to a maximum of one rod at one time and thus the requirements for a scram discharge volume are greatly reduced.
00 Franklin Research Center ADMshn d The Franl4n Institute C-3
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