View source for PNO-IV-97-021A, on 970422,extraction Steam Line Break Update Made.Licensee Anticipates Asbestos Removal by First Wk in May.Multidiscipline Investigation Team W/Several Industry Representative Being Assembled by Licensee

{{Adams
| number = ML20138A108
| issue date = 04/25/1997
| title = PNO-IV-97-021A:on 970422,extraction Steam Line Break Update Made.Licensee Anticipates Asbestos Removal by First Wk in May.Multidiscipline Investigation Team W/Several Industry Representative Being Assembled by Licensee
| author name = Johnson W, Walker W
| author affiliation = NRC OFFICE OF INSPECTION &amp; ENFORCEMENT (IE REGION IV)
| addressee name = 
| addressee affiliation = 
| docket = 05000285
| license number = 
| contact person = 
| document report number = PNO-IV-97-021A, PNO-IV-97-21A, NUDOCS 9704250244
| document type = PRELIMINARY NOTIFICATION OF EVENT OR OCCURRENCE (PNO,, TEXT-INSPECTION &amp; AUDIT &amp; I&amp;E CIRCULARS
| page count = 1
}}
{{#Wiki_filter:               April 25,1997 PRELIMINARY NOTIFICATION OF EVENT OR UNUSUAL OCCURRENCE PNO-IV-97-021 A This preliminary notification constitutes EARLY notice of events of POSSIBLE                        I sa,fety or. public interest significance. The information is as initially received without verification or evaluation, and is basically all that is                           '
known by Region IV staff in Arlington, Texas on this date.
Facility                             Licensee Emeraency Classification Omaha Public Power District                     Notification of Unusual Event t     Ft Calhoun 1                              Alert                                                     I Fort Calhoun, Nebraska                       Site Area Emergency                                    ,
Dockets: 50-285                             General Emergency                                       l X Not Applicable l

==Subject:==
EXTRACTION STEAM LINE BREAK - UPDATE This provides updated information relating to Preliminary Notification PNO-IV-97-021 issued i
on April 22,1997, describing an extraction steam line break at the Fort Calhoun Station.            l l
The licensee has informed the NRC that approximately 100 contractors will be used to remove the asbestos insulation debris which was scattered in the turbine building as a result of the event. Special environmental controls related to the asbestos debris have impacted the licensee's damage assessment process. The licensee anticipates complete asbestos removal by the first week in May.
The licensee also plans to conduct extensive walkdown inspections to identify and assess potential damage to plant equipment incurred as a result of the rupture. The plant equipment includes electrical cables, motor control centers, fire protection system, structural supports, and the turbine generator system.
A multidiscipline investigation team with severalindustry representatives is being assembled by the licensee to review the circumstances surrounding the event and to conduct a root cause analysis. The failure mode of the ruptured steam piping will also be evaluated by contract metallurgists.
Region IV will dispatch a specialinspection team on April 28,1997, to review the licensee's assessment and evaluate safety-related equipment and fire protection system responses, as well as operator responses to the event.
Region IV has notified OPA, OEDO and NRR.
The states of Nebraska and towa will be informed.
This information has been discussed with the licensee and is current as of 11 a.m. (CDT).

==Contact:==
Wayne Walker               William Johnson (402)426-9611          (8171860-8148 A
9704250244 970423                                                                         ,D PDR     I&E                                                                              <
PNO-IV-97-021A PDR 0
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