ML20064H013
| ML20064H013 | |
| Person / Time | |
|---|---|
| Site: | North Anna  |
| Issue date: | 12/12/1978 |
| From: | Stallings C VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.) |
| To: | Harold Denton, Parr O Office of Nuclear Reactor Regulation |
| References | |
| 665, NUDOCS 7812150289 | |
| Download: ML20064H013 (3) | |
Text
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VzmoxxzA ELucrazc Ann Powsm CourAxy Raouxown.vamonwrA sonet December 12, 1978 Mr. Harold R. Denton, Director Serial No. 665 Of fice of Nuclear Reactor Regulation LQA/ESG:esh Attn:
Mr. O. D. Parr, Chief Light Water Reactors Branch No. 3 Docket No. 50-338 Division of Project Management U. S. Nuclear Regulatory Comission License No. NPF-4 Washington, DC 20555 1
Dear Mr. Denton:
AMENDMENT 9 OPERATING LICENSE NPF-4 NORTH ANNA POWER STATION UNIT NO.1
' SUPPLEMENT TO PROPOSED TECHNICAL SPECIFICATION CHANGE NO.15 By our letter Serial No. 565 dated October 13, 1978, we proposed certain changes to the Technical Specifications for North Anna Unit No.1, resulting from our detailed study of instrument setpoints and setpoint al-lowables for each Reactor Protection System and Engineered Safeguards Fea-tures instrumentation channel. The results of our study had been previously
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submitted on September 29, 1978.
As a result of further review of the present Technical Specifications and the setpoint study, another revision has been determined to be necessary.
This revision is attached and specifies that the maximum trip points for the
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l overpower and overtemperature AT reactor trips shall not exceed the computed trip points by more than 2 percent span. This change is consistent with the I
setpoints and allowables presented in our September 29 report.
This proposed change has been reviewed and approved by the Station Nuclear Safety and Operating Committee and the System Nuclear Safety and Operating Committee.
Very truly yours, Mb C. M. Stallings Vice President-Power Supply and Production Operations Attachment Supplement to Technical Specification Change No. 15 cc:
Mr. James P. O'Reilly, Director Office of Inspection and Enforcement Region II 781215o>M 9
COMMONWALTH OF VIRGINIA
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S. S.
CITY OF RICHMOND
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Before me, a Notary Pub 1Ic, in and for the City and Common-wealth aforesaid, today personally appeared C. M. Stallings, who being duly sworn, made oath and said (1) that he is Vice President-Power Supply and Production Operations, of the Virginia Electric and Power Company, (2) that he is duly authorized to execute and file the fore-going Amendment in behalf of that Company, and (3) that the statements in the Amendment are true to the best of his knowledge and belief.
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Given under my hand and notarial seal this 174, day of hwemh
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My Commission expires. )o a va,v 7/' 19s/
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7 Notary Public I
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TABLE 2.2-1 (Continued)
REACTOR TRIP SYSTEM INSTRUMENTATION TRIP SETPOINTS
,=5 NOTATION (Continued)
E 1 S 2
Note 2:
Overpower AT 1 AT [K -K T-K6 (T-T")-f IAI)3 g 4 5 1+ 3,
2 S
Indicated AT at rated power where:
AT
=
g T
Average temperature, F
=
Indicated T,yg at RATED THERMAL POWER 1 580.3*F Ta
=
h K
1.086
=
4 0.02/*F for increasing average temperature K
=
5 0 for decreasing average temperatures K
=
5 0.00116 for T > T"; K6 = 0 for T 1 T" K
=
6 1 3 3
The function generated by the rate lag controller for T
=
I*'33 dynamic compensation avg Time constant utilized in the rate lag controller for T,yg r
=
3 3 = 10 secs.
T Laplace transform operator S
=
f (AI) =
0 for all AI 2
Note 3:
The channel's maximum trip point shall not exceed its computed trip point by more than 2 percent span.
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