View source for PNO-II-97-064, on 971229,inadvertent Safety Injection Occurred Due to Operators Failing to Perform Step Which Resulted in Cold Leg Injection Valve Being Left Open. Licensee Engineers Performing Evaluation

{{Adams
| number = ML20197F634
| issue date = 12/29/1997
| title = PNO-II-97-064:on 971229,inadvertent Safety Injection Occurred Due to Operators Failing to Perform Step Which Resulted in Cold Leg Injection Valve Being Left Open. Licensee Engineers Performing Evaluation
| author name = Lesser M
| author affiliation = NRC OFFICE OF INSPECTION &amp; ENFORCEMENT (IE REGION II)
| addressee name = 
| addressee affiliation = 
| docket = 05000413
| license number = 
| contact person = 
| document report number = PNO-II-97-064, PNO-II-97-64, NUDOCS 9712300262
| document type = PRELIMINARY NOTIFICATION OF EVENT OR OCCURRENCE (PNO,, TEXT-INSPECTION &amp; AUDIT &amp; I&amp;E CIRCULARS
| page count = 1
}}
{{#Wiki_filter:                    Daccmbar 29, 1997 0
PRELIMINARY NOTIFICATION.0F EVENT OR UNUSUAL OCCURRENCE PNO-II-97-064 Thio preliminary notification constitutes EEARLY notice of events of POSSIBLE ccfoty or public interest significance. The information is as initially                   :
received without, verification or evaluation, and is basically all that is known by Region II staff in Atlanta, Georgia on this date.                                l Facility                                       Licensee Emeraency Classification           i Duko Power Co.                                     Notification of Unusual Event            I i  Catcwba 1                                          Alert                                   ,
  ,    York, South Carolina                               Site Area Emergency                 'I Dockots: 50-413                                    General Emergency X Not Applicable Subjects    INADVERTENT SAFETY INJECTION The NRC received notification at 3:05 a.m. on December 29, 1997, from the                 !
licensee that an inadvertent safety injection' occurred on Catawba Unit 1 at 12:17 a.m. The event occurred while operators attempted to add make up water to the cold leg accumulators in preparation for entering Mode 3 following refueling. The operators were using intermediate head safety injection pump A to fill the accumulators. The operators failed to parform a step which resulted in the cold leg injection isolation valve baing left open. The pump was started in a subsequent-step, resulting in water from the refueling water storage tank being inadvertently injected                  ,
into the reactor coolant system. The safety injection was terminated in epproximately 4-5 minutes when operators secured the putnp.
A pressurizer heatup was in progress prior to the event so its heaters                  !
waro still energized when the pump was secured, resulting in a proscurizer heatup to approximately 440 degrees F over the next 12                      ,
minutes. Operators attempted to stabilize temperaturen by initiating pressurizer sproy, which unexpectedly caused (indicated) temperature to jump to 471 degrees F in the next 3 minutes. The_ unexpected heatup
      -cauced the-pressurizer to exceed technical specification heatup-limit (100 degrees F in 1 hour) . The maximum pressurizer pressure during this avont was 599 poig. The initial pressure was 560 psig.
Licensee engineers are performing an evaluation to determine the impact                 ~
of the temperature transient on the pressurizer as required by the techniccl specification.
The State of South Carolina was informed by the NRC.
The NRC received initial notification of this event by telephone from the               -
licensee _at 03:05 a.m. (EST) on December 29, 1997. This information is
      -current as of 10:00 a.m. (EST) on December 29, 1997.-
The senior resident inspector responded to the site for follow-up.

==Contact:==
M. LESSER (404)S62-4560    "
9712300262 971229 PDR    !bE PNO-II-97-064    PDR                         ,
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