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Home NRC Library Document Collections Events, Reports Associated with Event Notification Reports 2001

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  
.
+------------------------------------------------------------------------------+
|Power Reactor                                    |Event Number:   38521       |
+------------------------------------------------------------------------------+
+------------------------------------------------------------------------------+
| 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    |                             |
|                                                |                             |
|                                                |                             |
|                                                |                             |
+-----+----------+-------+--------+-----------------+--------+-----------------+
|UNIT |SCRAM CODE|RX CRIT|INIT PWR|   INIT RX MOD   |CURR PWR|  CURR RX MODE   |
+-----+----------+-------+--------+-----------------+--------+-----------------+
|1     N          Y       100      Power Operation  |100      Power Operation  |
|                                                   |                          |
|                                                   |                          |
+------------------------------------------------------------------------------+
                                   EVENT TEXT                                  
+------------------------------------------------------------------------------+
| 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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