PNO-II-93-026, on 930619,fuel Assembly Tilted Out of Position During Refueling of Unit 1 Cycle 7 Reload.Licensee Convened Incident Investigation Team to Review Event & Plans Formulated to Recover Fuel Assembly
| ML20045E581 | |
| Person / Time | |
|---|---|
| Site: | Sequoyah  |
| Issue date: | 06/21/1993 |
| From: | Kellogg P NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| To: | |
| References | |
| PNO-II-93-026, PNO-II-93-26, NUDOCS 9307020218 | |
| Download: ML20045E581 (2) | |
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. June 21, 1993 PRELIMINARY NOTIFICATION OF EVENT OR UNUSUAL OCCURRENCE PNO-II-93-026 This preliminary notification constitutes EARLY notice of events of POSSIBLE safety or public interest significance. The information is as initially received without verification or evaluation, and is basically all that is known by the Region II staff on this date.
Facility Licenseo Emercency Classification Tennessee Valley Authority X Notification of Unusual Event Scquoyah 1 Alert Soddy-Daisy, Tennessee Site Area Emergency Dockets: 50-327 General Emergency Not Applicable
Subject:
FUEL ASSEMBLY TILTED OUT OF POSITION DURING REFUELING (UNIT 1 CYCLE 7 RELOAD)
On June 19, 1993, at approximately 10:55 a.m.,
fuel movement on Unit 1 was halted due to a fuel assembly tilting out of position G7 during core reloading evolutions.
The assembly had been used during one previous cycle.
It also was the 44th assembly being reloaded.
The core holds 193 assemblies when fully loaded.
Operators had completed landing the assembly in position, unlatched the assembly from the fuel handling manipulator, and were raising the manipulator into the mast.
Operators looked into the vessel from the bridge and noticed the assembly tilting over.
The top of the assembly came to rest on the core baffle plate at approximately location A7. After movement stopped, the assembly appeared to be approximately 21 degrees from a vertical position.
Operators immediately ctopped fuel handling evolutions.
Operations entered the abnormal procedure for, Dropped or Damaged Fuel Assembly or Loss of Reactor Cavity Water Level and performed applicable steps.
At 11:49 a.m.,
the licensee declared a notification of Unusual Event based on conditions that warrant increased awareness.
Initial assessments indicated that radiation levels had not changed and that the assembly was not dauaged (no indication of increased activity due to possible fuel pin rupture).
The licensee immediately convened an incident investigation team to review the event.
Plans were formulated to recover the fuel assembly.
Senior management was assigned on a 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> basis to monitor recovery actions.
The NRC Senior Resident Inspector responded to the site to review the event and evaluate licensee actions.
Unit 2 was in Mode 5 throughout the event and was not affected.
The State of Tennessee was informed by the NRC Region II.
The licensee prepared a News Release for Monday June 21, 1993.
This information is current as of 8:00 a.m.,
June 21, 1993.
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PHO-II-93-026 R0gional Action:
Resident Inspector followup.
Contact:
Paul Kellogg (404)331-7878 i
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