ML19318A836

Forwards Response to IE Bulletin 80-05 Re Vacuum Conditions Resulting in Damage to Holdup Tanks.Lists Vacuum Conditions in Low Pressure & Holdup Tanks by Tank Name,Sys,Quantity/ Unit,Design Pressure & Protective Measures

ML19318A836
Person / Time
Site:	Perkins, Cherokee
Issue date:	06/09/1980
From:	Dail L DUKE POWER CO.
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
References
IEB-80-05, NUDOCS 8006240228
Download: ML19318A836 (2)

Text

"

[b DUKE POWER COMPANY

1. ~ "' " * ' * " '

GENERAL OFFICES ' "" " [f."d!

422 SOUTH CHURCH STREET ri j g lpIL\lugrrE, N. C. 28242 June 9, 1980 Mr. J. P. O'Reilly, Director U.S. Nuclear Regulatory Commission 101 Marietta Street, Suite 3100 Atlanta, Georgia 30303 s

Re: Perkins Nuclear 4tation w s Docket Non.:(50-488, 50-489, 50-490 j Cherokee Nuclear sEation Docket Nos.: 50-491, 50-492, 50-493 IE Bulletin 80-05 Duke File: P81-1412.11-1

Dear Mr. O'Reilly:

1 Enclosed is Duke Power's response to IE Bulletin 80-05 which was transmitted by your letter of March 10, 1980.

Very truly yours,

. C. Dail, Vic resident Design Engineering 4

', EKM/pam O

Enclosure 4

(

80062402E E OFFICIAL CODY

CHEROKEE & PERKINS NUCLEAR STATIONS - RESPONSE TO lE BULLETIN 80-05 VACUU1 CONDITIONS IN LOW PRESSURE AND HOLDUP TANKS

. TANK NAME SYSTEM QUANTITY / UNIT INSIDE OR EXTERNAL DESIGN VACUUM PROTECTION OUTSIDE PRESSURES MEASURES Volume Control Tank NV 1 Inside 15 psid Designed for full vacuum Reactor Drain Tank NB 1 Inside 15 psid Designed for full vacuum Holdup Tank NB 1 Outside 0.5 psid Vacuum breaker redundant to unvalved vent to

. Filtered Exhaust Gas Collection Header l Refueling Water Tank NB 1 Outside 0.5 psid Redundant, heat-traced 1 vacuum breakers; Vent to l Gas Collection Header j through a locked open i

1 valve.

Equipment Drain Tank NB 1 Inside 15 psid Designed for full vacuum Waste Tanks WM 4 Inside 0.5 psid Unvalved vent to Filtered

,; Exhaust Gas Collection

Header; Calculations per-formed to insure adequate vent size.

Containment

• WM 2 Inside 0.5 psid unvalved vent to Gas

! Cooler Condensate T,anks Collection Header; Calcul-tions performed to insure adequate vent size.

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• Normal contents of these tanks is clean condensate. If there were a Reactor Coolant System leak inside containment,

, some evaporated reactor coolant could condense on the containment cooler coils and drain to the Containment Cooler i Condensate Tanks. However, containment isolation valves to the Containment Cooler Condensate Tanks would close on l high containment radioactivity.

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