Event Notification Report for November 29, 2001
U.S. Nuclear Regulatory Commission
Operations Center
Event Reports For
11/28/2001 - 11/29/2001
** EVENT NUMBERS **
38521
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|Power Reactor |Event Number: 38521 |
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| FACILITY: GRAND GULF REGION: 4 |NOTIFICATION DATE:11/28/2001 |
| UNIT: [1] [] [] STATE: MS |NOTIFICATION TIME:20:00[EST] |
| RXTYPE: [1] GE-6 |EVENT DATE: 11/28/2001 |
+------------------------------------------------+EVENT TIME: 18:20[CST] |
| NRC NOTIFIED BY: KARL EHRHARDT |LAST UPDATE DATE: 11/28/2001 |
| HQ OPS OFFICER: LEIGH TROCINE +-----------------------------+
+------------------------------------------------+PERSON ORGANIZATION |
|EMERGENCY CLASS: NON EMERGENCY |WILLIAM JOHNSON R4 |
|10 CFR SECTION: |JOSE CALVO NRR |
|NONR OTHER UNSPEC REQMNT | |
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| | |
| | |
+-----+----------+-------+--------+-----------------+--------+-----------------+
|UNIT |SCRAM CODE|RX CRIT|INIT PWR| INIT RX MOD |CURR PWR| CURR RX MODE |
+-----+----------+-------+--------+-----------------+--------+-----------------+
|1 N Y 100 Power Operation |100 Power Operation |
| | |
| | |
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EVENT TEXT
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| CONFIRMATION OF A LOOSE PART IN THE REACTOR SYSTEM (DISCOVERY OF AN
|
| OBSTRUCTION IN A JET PUMP NOZZLE) |
| |
| During a daily jet pump surveillance test at approximately 1800 CST on |
| 11/27/01, the licensee discovered that the flow through reactor |
| recirculation jet pump #13 was reduced. Although one of three surveillance |
| criteria was not met, the jet pump and recirculation system remained |
| operable because at least two of the three criteria were met. The |
| surveillance criteria that was not met involved a deviation of jet pump |
| flows from one jet pump to the other jet pumps (i.e., flow not being within |
| 10% of an established pattern). |
| |
| The licensee reported that the loose parts detection system was not working |
| and was undergoing a review for potential removal. However, further |
| analysis today (11/28/01) confirmed that one nozzle of jet pump #13 is |
| obstructed by a loose part. The obstruction size and type have not yet been |
| determined. Additional investigations are ongoing. |
| |
| The licensee stated that confirmation of a loose part in the reactor system |
| constitutes a 1-hour reportable event in accordance with procedure 01S065. |
| This was also reported to be a commitment in the Final Safety Analysis |
| Report. |
| |
| The licensee contacted General Electric and the NRC resident inspector. |
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