ML20085K723
| ML20085K723 | |
| Person / Time | |
|---|---|
| Site: | Perry  |
| Issue date: | 10/12/1983 |
| From: | Edelman M CLEVELAND ELECTRIC ILLUMINATING CO. |
| To: | James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| References | |
| 10CF-50.55E, 10CFR-050.55E, 10CFR-50.55E, RDC-82(83), NUDOCS 8310210112 | |
| Download: ML20085K723 (2) | |
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t i i P.o. Bo X 5000 - CLEVELAND. OHIO 44101 - TELEPHONE (216) 622-9800 - ILLUMINATING BLDG.
- 55 PUBLICSOUARE Serving The Best Location in the Nation MURRAY R. EDELMAN VICE NIESIDENT October 12, 1983 NUCMAR Mr. James G. Keppler Regional Administrator, Region III Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission 799 Roosevelt Road Glen Ellyn, Illinois 60137 RE:
Perry Nuclear Power Plant Docket No. 50-440 Incident Involving Damage to the Dryer / Separator Strongback
[RDC 82(83)]
Dear Mr. Keppler:
This letter serves as an interim report pursuant to 10CFR50.55(e) on any potential damage which resulted from the(fpilure to follow procedures during an attempt to remove the Unit 1 Shroud Head / Separator from the Reactor Pressure Vessel by the use of a strongback and polar crane 2 Mr. P. R. Pelke of your office was first notified on September 16, 1983, by Mr. E. Riley of The Cleveland Electric Illuminating Company (CEI) that extensive evaluation will be required to assess the significance of any damage.
This report contains a description of the incident which resulted in this potential significant deficiency, identifies the equipment being evaluated, outlines the steps being taken to determine the extent of the damage, and corrective action requested.
Description of Incident On September 15, 1983, a Perry Nuclear Power Plant (PNPP) contractor was attempting to { remove the Unit 1 Shroitd Head / Separator from the Reactor Pressure Vessel (RPV) by the use of a strongback and the Polar Craneg The attempt ceased when the strongback suffered damage. The damage was caused because the contractor had not removed the studs holding the Shroud Head / Separator to the Shroud flange. This was contrary to procedural requirements.
Equipment Being Evaluated Unit 1 Polar Crane Unit 1 Reactor Pressure Vessel Internals Unit 1 Shroud Head / Separator Unit 1 Dryer / Separator Strongback 8310210112 831012 00y14 M PDR ADOCK 05000440 l
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Mr. James G. Keppler October 12, 1983 Actions to Determinc Extent of Damage CEI contacted the Polar Crane vendor, P&H Harnischefeger, to notify them of the patential overload on the crane and requested their recommendations on items to check for damage. None of the inspections recommended by P&H Harnt-schefeger have shown any damage to any part of the crane. As a precaution we replaced the potentially overloaded wire cable with a new certified cable.
The crane has been tested to a lower weight initially to remove the Shroud Head / Separator from the RPV.
It will be retested using recammendations from P&H Harnischefeger.
CEI also contacted the RPV, Shroud Head / Separator, and strongback vendor, GE-NEBO, for recommendations on items to check on the Shroud Head / Separator and RPV for damage. The Contractor has brought an exact duplicate strongback from a cancelled nuclear plant and has load tested and certified it for use at PNPP. We have performed inspections in accordance with all GE-NEB 0 recommenda-tions and have found no rejectable items. Further testing on the RPV and/or Shroud Head / Separator will be required by GE-NEB 0 af ter the Shroud Head /
Separator has been removed from the RPV. CEI has requested that GE-NEB 0 do an analysis on the accident to determine as accurately as possible the load required to damage the strongback and whether that load might have any affect on the RPV internals. We will also supply the load to P&H Harnischefeger for their records.
Corrective Action The site contractor has been directed to revise his procedures to require sequencing documents, briefing, and rigging sketches prior to lifting items such as the Shroud Head / Separator.
Because further evaluation and testing will be required on the Polar Crane, Shroud Head / Separator, and RPV, another report will be issued January 31, 1984.
Please call if you have any questions.
- incerely, Murray R.
delman Vice President Nuclear Group MRE:pab cc:
Mr. M. L. Gildner NRC Site Office Director Office of Inspection cnd Enforcement U.S. Nuclear Regulatory Commission Washington, D.C.
20555 U.S. Nuclear Regulatory Commission c/o Document Management Branch Washington, D.C.
20555 Records Center, SEE-IN Institute of Nuclear Power Operations 1100 Circle 75 Parkway, Suite 1500 Atlanta, Georgia 30339
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