View source for PNO-III-85-062, on 850719,confirmatory Action Ltr Issued Requiring Review of All Canceled or Rejected Change Requests to Verify Status of Drawing Changes Prior to Restarting Both Reactors

{{Adams
| number = ML20128N562
| issue date = 07/19/1985
| title = PNO-III-85-062:on 850719,confirmatory Action Ltr Issued Requiring Review of All Canceled or Rejected Change Requests to Verify Status of Drawing Changes Prior to Restarting Both Reactors
| author name = Chrissotimos N, Greenman E
| author affiliation = NRC OFFICE OF INSPECTION &amp; ENFORCEMENT (IE REGION III)
| addressee name = 
| addressee affiliation = 
| docket = 05000373, 05000374
| license number = 
| contact person = 
| document report number = PNO-III-85-062, PNO-III-85-62, NUDOCS 8507260228
| document type = PRELIMINARY NOTIFICATION OF EVENT OR OCCURRENCE (PNO,, TEXT-INSPECTION &amp; AUDIT &amp; I&amp;E CIRCULARS
| page count = 1
}}
{{#Wiki_filter:" PPELIMINARY NOTIFICATION OF EVENT OR UNUSUAL OCCURRENCE--PNO-III-85-62             Date July 19, 1985 This preliminary notification constitutes EARLY notice of events of POSSIBLE safety or               O public interest significance.      The information is as initially received without veri-fication or evaluation, and is basically all that is known by the staff on this date.
Facility: Commonwealth Edison Company                      Licensee Emergency Classification:
LaSalle    Nuclear Plant                             Notification of an Unusual Event Marseilles, IL 61341                                 Alert Site Area Emergency Docket No. 50-373, 50-374                            General Emergency XX    Not Applicable

==Subject:==
CAL ISSUED BECAUSE OF FAULTY INSTALLATION On July 19, 1985, Region III issued a Confirmatory Action Letter requiring the licensee to
< review all cancelled or rejected drawing change requests (DCRs) on Units 1 and 2 to verify th3 status of the DCRs prior to restarting both reactors. (The units are currently in cold shutdown.)
The CAL was issued as a result of a July 17, 1985, report in which the licensee said four Residual Heat Removal (RHR) shutdown cooling suction high flow isolation switches in Unit I had been installed properly. The licensee discovered the problem while performing a special test to confirm the operability of ECCS instrumentation.
The licensee determined that the installation error was caused when a change in piping to the switches in 1982 was not reflected in the field drawing. As a result, a later modification to the switches was based on incomplete information. Piping to the switches was installed backwards, and the switches would not have worked if called upon.
The safety significance of this event is minimal since the system is isolated during reactor operation, startup or hot standby.
Unit I has been operating since March 1985 with the erroneous installation.
The State of Illinois will be notified.
R:gion III was first informed of this event at 5:35 p.m. (CDT), July 17, 1985.
This information is current as of 4 p.m. (CDT       July 19, 1985.
Y      Y.
CONTACT:            N. Chrissotimos         E. Greenman FTS 388-5518
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