ML20215B907

Confirms 870518 & 26 Notification to Resident Inspectors of Unacceptable Instrument Air Venting Capability Containment Test,Per 10CFR50,App R.Mods to Install Instrument Air Header Valve Vent Connection & Bypass Piping Completed

ML20215B907
Person / Time
Site:	Point Beach
Issue date:	06/09/1987
From:	Fay C WISCONSIN ELECTRIC POWER CO.
To:	NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM)
References
CON-NRC-87-059, CON-NRC-87-59 VPNPD-87-234, NUDOCS 8706170501
Download: ML20215B907 (2)

Text

'

1 sb

- Wisconsin Electnc eom coww l

231 W. MICHIGAN. P.O. BOX 2046, MILWAUKEE, Wl 53201 '

(414)277 2345 j

i L.

'VPNPD-87-234 i

NRC-87-059 I

1 June 9, 1987 U.

S.

NUCLEAR REGULATORY' COMMISSION

' Document' Control Desk Washington, D.C.

20555 Gentlemen:

DOCKET NOS. 50-266 AND 50-301 10 CFR 50 APPENDIX R, SAFE SHUTDOWN CAPABILITY POINT BEACH NUCLEAR PLANT, UNITS 1 AND 2 i

This is to confirm our notification to the PBNP resident l

inspectors on-May 18 and' subsequent discussion with the resident inspectors on May 26, 1987 of the following item related to Appendix R compliance.

The PBNP abnormal operating procedure for control room inaccessibility (AOP 10A), which is the applicable procedure for Appendix R safe hot shutdown, states that the instrument air supply to containment is to.be isolated'and vented in order to prevent spurious operation of the pressurizer PORVs and letdown isolation valves, j

Instrument air venting. capability for the: Unit 1 containment was tested during the recently completed refueling outage.

Venting of the instrument air header,-which depended upon component air usage and system leakage, required 28 minutes to allow PORV l

closure.. -We determined the available vent capability to be unacceptable and initiated a modification to install an instru-ment air header valved vent connection outside containment.

We also determined that bypass piping should be installed around check valves located in the instrument air supply to the PORV

. operators.

Both' modifications were installed and a successful

. instrument air header depressurization test was performed before j

.the end of the refueling outage.

1 i

1 8706170501 870609.

PDR ADOCK 05000266 F

pon gb bbl @

s, b

i

1 s*'

-\\

h'

.l 1

. Document Control Desk June 9, 1987 Page 2 A similar modification has been initiated to install an instru-'

ment air ~ header vent valve outside of. Unit 2 containment.

Installation of this modification is scheduled for the' Fall 1987-refueling outage.

A capped test connection, which can provide satisfactory vent capacity until the scheduled modification is installed,~is accessible outside containment.

Bypass piping.

around check valves in the instrument air supply to the Unit 2 PORV operators has been installed.

Thus, the existing instru-ment air vent capability is adequate and interim compensatory measures are not necessary.

If you have any questions, please contact us.

f Very truly yours,

.lg.z)

C. W. Pay Vice President Nuclear Power Copies.to NRC Resident Inspector 4

NRC Regional Administrator, Region III l

i i