ML20054F698

Ro:Advises of Mod to Corrective Action Noted in Informing NRC of Valve Left Open in Line That Penetrates Containment Wall.Red Danger Tags on Valves Outside Containment Removed,As Pipe Cap Insures Flow Path Isolated

ML20054F698
Person / Time
Site:	University of Missouri-Columbia
Issue date:	05/25/1982
From:	Mckibben J MISSOURI, UNIV. OF, COLUMBIA, MO
To:	Office of Nuclear Reactor Regulation
References
NUDOCS 8206170229
Download: ML20054F698 (1)

Text

-- . _ _ _ _ _ _ _ - _ _ - _

UNIVERSITY OF MISSOURI Research Park Columbia. Missouri 65211 May 25, 1982 Telephone (314) 882-4211 Director of Licensing U. S. Nuclear Regulatory Commission Washington, D.C. 20555

Reference:

a) Docket 50-186, License R-103 University of Missouri Research Reactor b) Letter to Nuclear Regulatory Commission, Director of Licensing, dated March 20, 1981

Subject:

Modification to corrective action contained in reference (b).

Dear Sir:

In our letter dated March 20, 1981, to the U. S. Nuclear Regulatory Commission, we informed you about an event in which a valve in a 3/4 inch line that penetrates the containment wall and is open ended on both sides was left open. Our corrective action included installing a pipe cap on the cnd of the pipe inside containment and hanging red " Danger" tags on the valves located outside of containment. The red tags have been removed due to the pipe cap inside containment being sufficient to insure this flow path is isolated and the use of red tags in this situation could degrade their significance, which would decrease the safety provided by their use.

After reviewing this use of red tags, the Reactor Safety Subcommittee recommended the above change to the corrective action.

. Sincerely,

~

J. C, McKibben Reactor Manager JCMK:vs cc: NRC - Region III N 8206170229 820525

{DRADOCK 05000186 PDR Q,* C'+f mice a 4 jg COLUMBIA KANSAS CITY ROLLA ST. LOUIS an equal opportunity institution

_ . _ . _ . .