View source for PNO-III-86-049, on 860522,Region III Dispatched Augmented Insp Team to Review Circumstances Surrounding 860519 Reactor Trip,Including Equipment Problems Involving Failure of Turbine Bypass & Atmospheric Dump Valves

{{Adams
| number = ML20205Q084
| issue date = 05/22/1986
| title = PNO-III-86-049:on 860522,Region III Dispatched Augmented Insp Team to Review Circumstances Surrounding 860519 Reactor Trip,Including Equipment Problems Involving Failure of Turbine Bypass & Atmospheric Dump Valves
| author name = Burgess B, Hehl W
| author affiliation = NRC OFFICE OF INSPECTION &amp; ENFORCEMENT (IE REGION III)
| addressee name = 
| addressee affiliation = 
| docket = 05000255
| license number = 
| contact person = 
| document report number = PNO-III-86-049, PNO-III-86-49, NUDOCS 8605280155
| document type = PRELIMINARY NOTIFICATION OF EVENT OR OCCURRENCE (PNO,, TEXT-INSPECTION &amp; AUDIT &amp; I&amp;E CIRCULARS
| page count = 2
}}
{{#Wiki_filter:0 7n 8-PRELIMINARY NOTIFICATION OF EVENT OR UNUSUAL OCCURRENCE--PNO-III-86-49           Date May 22, 1986 This preliminary notification constitutes EARLY notice of events of POSSIBLE safety            ,
t' or public interest significance. The information is as initially received without verification or evaluation, and is basically all that is known by the Region III staff on this date.
Facility: Consumers Power Company                   Licensee Emergency Classification:
Palisades Nuclear Generating Plant XX      Notification of an Unusual Event Covert, MI 49043                           Alert Site Area Emergency Docket No: 50-255                          General Emergency Not Applicable

==Subject:==
AUGMENTED INSPECTION TEAM TO REVIEW RECENT EQUIPMENT PROBLEMS R:gion III (Chicago) has dispatched an Augmented Inspection Team to review the circumstances surrounding a reactor trip which occurred on May 19, 1986. Although plant safety systems generally performed as designed during the reactor trip, several equipment problems occurred. These equipment problems, coupled with various problems that have occurred over the past 18 months, led to the formation of the Augmented Inspection Team.
The Augmented Inspection Team is composed of Region III personnel and representatives from the Office of Inspection and Enforcement, Office of Nuclear Reactor Regulation, and Office of Analysis and Evaluation of Operational Data. The team will focus on the plant's maint: nance activities and procedures for determining equipment operability.
A Confirmatory Action Letter was issued by Region III to the licensee on May 21, 1986, documenting the licensee's agreement to rtace the unit in cold shutdown, pending a review by th licensee of the May 19 event and an #',aluation of the operability of other safety-related and balance-of-plant equipnent. The licensee is also to notify Region III of c:rr:ctive actions taken as a result of these reviews and receive concurrence of the Regional Administrator for resuming operations.
In th? May 19 incident, the reactor tripped from high pressure after a loss of turbine control power. Equipment problems included the failure of the turbine bypass valve to open automatically, the failure of one atmospheric dump valve to open, failure of a letdown DISTRIBUTION:
H. St.                       E00       NRR        E/W        Willste      Mail: ADM:0MB Chainnan Palladino           PA                   IE         NMSS                 D0T:Trans only Com. Zech                    ELD                  OIA        RES Comm. Bernthal                                    AEOD Com. Roberts Conrn. Asselstine            SP ///9         Regional Offices ACRS SECY                         INP0//.2/            NSAC //. 9 CA                           RIII Yesident Office                                                       g PDR                          Licensee:     //. SL (Corp. Office - Reactor Lic. Only)                 D fgj    g 55 060522                                  Region III                   C PNO-III-06-049 PDR                                  Rev. November 1985      g3

PRELIMI_ NARY NOTIFICATION OF EVENT OR UNUSUAL OCCURRENCE--PNO-III-86-49    Date May 22, 1986
                                                 ;    intermediate pressure control valve, and failure of a pressurizer spray valve to reseat.
Upon evaluation of the shutdown, the licensee declared an Unusual Event under its emergency
  . pl an.'
The licensee is planning to issue a news announcement on the shutdown and the pending NRC Augmented Inspection Tean review. A special review team has also been formed by the licensee.
Th2 State of Michigan will be notified.
This information 1. current as of 9 a.m., May 22,1986.
                '8 CONTACT:
                        <pm f,. Burgess fh W. Hehl FTS 388-5689       FTS 388-5552
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