ML19291C465
| ML19291C465 | |
| Person / Time | |
|---|---|
| Site: | Oyster Creek |
| Issue date: | 01/17/1980 |
| From: | Cervenka P JERSEY CENTRAL POWER & LIGHT CO. |
| To: | |
| Shared Package | |
| ML19291C462 | List: |
| References | |
| NUDOCS 8001240459 | |
| Download: ML19291C465 (2) | |
Text
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Initial Telephone Date of Report Date:
Occurrence: _ January 16, 1980 _
Initial Written Time of Report Date:
January 17, 1980 Occurrence:
1430 hours0.0166 days <br />0.397 hours <br />0.00236 weeks <br />5.44115e-4 months <br /> OYSTER CREEK I4UCLEAR gel 4ERATIl4G STATION FORKED RIVER,f4EW JERSEY 08731 P,eportable Occurrence Report tio. 50-219/80/3-l P IDENTIFICATION Discovery of two crack indications in the core spray sparger 0F OCCURRENCE:
piping.
This event is considered to be a reportable occurrence as defined in the Technical Specifications, paragraph 6.9.2,A,(9).
CONDITIONS PRIOR
_ Steady State Power
_ _ Routine Shutdown TO OCCURRENCE:
_ _ Hot Standby Operation
_ __ Cold Shutdown Load Changes During X_ Refueling Shutdown Routine Power Operation Routine Startup
_ Other (Specify)
Operation Mode switch in refuel with reactor coolant less than 212 F.
DESCRIPTION On Wednesday, January 16, 1980, while performing inservice OF GCCURREl4CE:
inspection on the core spray sparger piping for System II, two indications were discovered.
These indications were subsequently evaluated and tentatively determined to be cracks.
Initial investigation reveals that the first indication is located at an azimuth approximately 150 and adjacent to the sparger header branch weld.
The indication appears to extend approximately 12V circumferential1y.
The second indication is located at an azimuth approximately 165.
This indication runs at an angle of approximately 30 -40 to the centerline of the sparger and is approximately 2-3 inches in length with two branch indications running vertically for approximately 2 inches.
Subsequent to the discovery, an air test was performed on the sparger.
This test indicated that the crack indications may not be through wall as evidenced by lack of air penetration.
1794 229 '.
S00124 04
e Reportable Occurrence Page 2 Report No. 50-219/80/3-lP APPARENT CAUSE Design Procedure OF OCCURRENCE:
Manufac ture Unusual Service Condition X
Installation /
Inc. Environmental Construction Component Failure Operator Other (Specify)
The cause of the indications is being investigated at this time.
ANALYSIS OF Cracking of the core spray sparger in the areas found to have OCCURRENCE:
indications could possibly cause a loss of redundancy in the core spray systems should a complete break occur. A complete break and separation of the piping could reduce the capability of the Core Spray System II to adequately wet the core during a LOCA condition. Further investigation of the indications and analysis of the consequences will provide for a more firm analysis of the occurrence.
CORRECTIVE Corrective action will be determined af ter a full investigation ACTION:
is complete.
FAILURE DATA:
Not applicable Prepared by:
[,,,
Date:
/ 2/ro Pau Cervenka 1794 230
.