ML19323F782

Interim Deficiency Rept Supplementing 791214 Rept Re Circuits.Steam Supply Valves TV-MS211 a & B Not Previously Reported Because Main Feedwater Pump Trip Woould Trip Valves.Design Change to Be Completed by 810101

ML19323F782
Person / Time
Site:	North Anna
Issue date:	05/22/1980
From:	Sylvia B VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:
References
459, NUDOCS 8005290462
Download: ML19323F782 (2)

Text

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b b VtmoxxxA Er.zcTazc Ann Powsm COMPANY Ric umown.Va mornts, asset

? tisy 22, )"O "r. Jares P. Oelliy, Director ?erial :!o. 450 Cffice of Inspection & Enforcenent  !!O/RMT:es U.S. "uclear Regulatory Cer:nission Pocket ?'o. 50-330 re glen II 101 "arietta Street, Suito 3100 Atlanta, Georgia 30303

ear Mr. O'Peilly:

N Eccember 14, 19 70 , a 30 day report (Ferial No. 964A) was subeltted under the provisions of 10 CFR 50.55(e) concerning several CDA and SI circuits which did not comply with various cornitments in the ?? orth Anna FFAR and indicating their individual revision status. Following is additional infor-Ation re9,ard-in; the resolution of items identified in our Decembe r 14, 19 79 letter.

The se rvice water valves to containnent recirculation air coolers (??OV-SW210 A and B, 214 A and 3, and TV-SU201 A and 3) will not be redified because the code of cooling has never been used and because it is under adninistrative control. Altbcunh there valves do return to their non-sa fety node following reset of CDA, the containment isolation valves, ubich are in series with the FU valves, will remain closed thereby preventieg the service water post accident flow path from being a f fected by the resetting of the COA signal.

The auxiliary feedva te r nues turbine stear supply valves (T'!-MS211 A snd 3) were not previcusly reported because the tripping of the nain feedvater pumps on a Safety In'ection Signal would " scal in" the trip valves causinc. then to stay open v5cn the SI Signal was reset. However, to be consistent with the station design. a redtfication to the circuit vill be rade so that these ralves will re-ain open fallowing reset of SI regardless of the main feedvater pucp breaker position.

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"r. Jaees  ?. O 'N.111y 2 The divert valves for the Air E'ector Exhaust path ara presently being

'f controlled throuth the use of administrative controls as was specified in our initial report. A design change will be done to correct the probler. At present, Vepco has atreed to c mplete this design chan2e by January 1,19 31.

7ery truly yours.

ORIGI2TAL SIG;g gy B. R. SYLVIA

3. R. Sylvia

!!anager-Puclear Operation and !!aintenance cc: Mr. Victor Stello, Director Office of Inspection and Enforcenent

!fr. 3. Joe Youngblood , Chief Licensing Branch 1 Division of Licensing U.S. 7enulatory Cotmission c/o Document "anagenent Branch iashinr, ton, D.C. 20555