View source for PNO-V-87-034, on 870502,w/plant in Cold Shutdown for 16 Months,Licensee Began Planned 7-day Dual Train Decay Heat Sys Outage.Steam Generators Operable & Available for Dhr. Resident Inspectors Monitoring Outage

{{Adams
| number = ML20215L515
| issue date = 05/05/1987
| title = PNO-V-87-034:on 870502,w/plant in Cold Shutdown for 16 Months,Licensee Began Planned 7-day Dual Train Decay Heat Sys Outage.Steam Generators Operable & Available for Dhr. Resident Inspectors Monitoring Outage
| author name = Dangelo A, Miller L
| author affiliation = NRC OFFICE OF INSPECTION &amp; ENFORCEMENT (IE REGION V)
| addressee name = 
| addressee affiliation = 
| docket = 05000312
| license number = 
| contact person = 
| document report number = PNO-V-87-034, PNO-V-87-34, NUDOCS 8705120270
| document type = PRELIMINARY NOTIFICATION OF EVENT OR OCCURRENCE (PNO,, TEXT-INSPECTION &amp; AUDIT &amp; I&amp;E CIRCULARS
| page count = 1
}}
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PRELIMINARY NOTIFICATION OF EVENT OR UNUSUAL OCCURRENCE--PNO-RV-87-34 Date: 05/05/87 This preliminary notification constitutes EARLY notice of events of POSSIBLE. safety or-
   .public interest significance. The information presented is as initially received
  -without; verification or- evaluation and is basically all that is known by Region V staff on this date.                                                                                   i FACILITY: Sacramento Municipal' Utility District              Emergency Classification o
Rancho Seco                                          Notification of Unusual Event Docket No. 50-312                                    Alert Site Area Emergency General Emergency X Not Applicable

==SUBJECT:==
DUAL TRAIN DECAY HEAT SYSTEM OUTAGE AT RANCHO SECO-On May 2, 1987, at'8:40 am, with the plant in cold shutdown for sixteen months, the 111censee began a planned seven day dual train decay heat system outage. Decay heat
:will be removed using alternate methods that the licensee has demonstrated to have the capacity to maintain a cold shutdown condition.
:Prestntly the reactor coolant system is filled and vented on a steam bubble with no forctd flow. Plant pressure is being maintained at 218 psig. Average incore thtrmocouple temperature is 120 F and cold leg temperatures are approximately 110'F.
  . The steam generators are operable and available for decay _ heat removal. The licensee is using an operating procedure for the control of the alternate removal of decay heat.
  -Ths rssident inspectors are monitoring the dual train outage.
This information is current as of 4:00 pm on May 4, 1987.
                                                                ~
CONTACT:    A. D'Angelo                      L. Miller (209)-748-2791                   FTS 463-3869 DISTRIBUTION H St.                 MNBB      Phillips l# #E/W       Willste       Air Rights'#     Mail:
Chairman Zech          EDO       NRR           IE       NMSS                          ADM:DMB COMM. Roberts PA                      OIA      RES                    D0T:Trans Only Comm. Asselstine       MPA                     AE0D Comm. Bernthal-        OGC Coast. Carr            Regions:                                                                    1 SECY                             INP0ig:tT. NSAC 12? '/A ACRS                             Licensee: i: y 4 CA .                             (ReactorLicensees)              REGION V: FORM 211 PDR                              Resident Inspector /*//                (Revised 3/14/83) y coerMnM G8 ret 121           -
51    70 8705 $                                                                 O PNO-RV-87-034     PDR}}

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