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Event Notification Report for April 27, 2001

                    U.S. Nuclear Regulatory Commission
                              Operations Center

                              Event Reports For
                           04/26/2001 - 04/27/2001

                              ** EVENT NUMBERS **

37823  37945  37946  37947  

!!!!!!!!! THIS EVENT HAS BEEN RETRACTED. THIS EVENT HAS BEEN RETRACTED  !!!!!!!
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|Power Reactor                                    |Event Number:   37823       |
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| FACILITY: MONTICELLO               REGION:  3  |NOTIFICATION DATE: 03/10/2001|
|    UNIT:  [1] [] []                 STATE:  MN |NOTIFICATION TIME: 18:59[EST]|
|   RXTYPE: [1] GE-3                             |EVENT DATE:        03/10/2001|
+------------------------------------------------+EVENT TIME:        17:05[CST]|
| NRC NOTIFIED BY:  P DECKER                     |LAST UPDATE DATE:  04/26/2001|
|  HQ OPS OFFICER:  JOHN MacKINNON               +-----------------------------+
+------------------------------------------------+PERSON          ORGANIZATION |
|EMERGENCY CLASS:          N/A                   |JOHN MADERA          R3      |
|10 CFR SECTION:                                 |                             |
|*UNA 50.72(b)(3)(ii)(B)  UNANALYZED COND OP     |                             |
|                                                |                             |
|                                                |                             |
|                                                |                             |
+-----+----------+-------+--------+-----------------+--------+-----------------+
|UNIT |SCRAM CODE|RX CRIT|INIT PWR|   INIT RX MODE  |CURR PWR|  CURR RX MODE   |
+-----+----------+-------+--------+-----------------+--------+-----------------+
|1     N          N       0        Cold Shutdown    |0        Cold Shutdown    |
|                                                   |                          |
|                                                   |                          |
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                                   EVENT TEXT                                   
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| DIFFERENTIAL PRESSURE TO OPEN THE SUPPRESSION CHAMBER TO DRYWELL VACUUM      |
| BREAKERS DISCREPANCIES WERE IDENTIFIED.                                      |
|                                                                              |
| During review of Inservice Testing requirements, while the plant was in      |
| shutdown, discrepancies were identified with acceptance criteria for the     |
| torque values used to determine the equivalent differential pressure to open |
| the suppression chamber to drywell vacuum breakers.  The measured torque     |
| values indicate that the differential pressure required to fully open the    |
| suppression chamber to drywell vacuum breakers would be greater than that    |
| assumed in containment analyses.  The suppression chamber to drywell vacuum  |
| breakers insure that the 2 psig external design pressure for the primary     |
| containment drywell suppression chamber and vent system is not exceeded and  |
| containment integrity is assured.                                            |
|                                                                              |
| The NRC Resident Inspector will be notified of this event by the licensee.   |
|                                                                              |
| * * * RETRACTION ON 04/23/01 AT 1805ET BY JIM MCKAY TAKEN BY MACKINNON * *   |
| *                                                                            |
|                                                                              |
| Retraction of notification made on March 10, 2001. The notification stated   |
| that discrepancies were identified with acceptance criteria for the torque   |
| values used to determine the equivalent differential pressure to open the    |
| suppression chamber to drywell vacuum breakers.  The measured values         |
| indicated a greater differential pressure required to fully open then        |
| assumed in containment analysis.  Upon further evaluation and review of the  |
| containment analyses, the results of the containment analysis were           |
| effectively independent and not adversely impacted by the suppression        |
| [chamber to drywell vacuum breaker full open differential pressure           |
| assumption in the range of concern.  Therefore, an unanalyzed condition that |
| significantly degrades the plant safety did not exist.]                      |
|                                                                              |
| R3DO (Tom Kozak) has been notified.                                          |
|                                                                              |
| NRC Resident Inspector will notified of this retraction by the licensee      |
|                                                                              |
| * * * UPDATE 1000EDT ON 4/26/01 TO S. SANDIN * * *                           |
|                                                                              |
| The above retraction was updated to include information shown in brackets    |
| which had been submitted but inadvertently omitted from the report.          |
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|Other Nuclear Material                           |Event Number:   37945       |
+------------------------------------------------------------------------------+
+------------------------------------------------------------------------------+
| REP ORG:  CROWE BUTTE RESOURCES                |NOTIFICATION DATE: 04/26/2001|
|LICENSEE:  CROWE BUTTE RESOURCES                |NOTIFICATION TIME: 15:29[EDT]|
|    CITY:  CRAWFORD                 REGION:  4  |EVENT DATE:        04/26/2001|
|  COUNTY:                            STATE:  NE |EVENT TIME:        11:30[CDT]|
|LICENSE#:  SUA-1534              AGREEMENT:  Y  |LAST UPDATE DATE:  04/26/2001|
|  DOCKET:                                       |+----------------------------+
|                                                |PERSON          ORGANIZATION |
|                                                |BILL JONES           R4      |
|                                                |JOHN HICKEY          NMSS    |
+------------------------------------------------+                             |
| NRC NOTIFIED BY:  MIKE GRIFFIN                 |                             |
|  HQ OPS OFFICER:  DOUG WEAVER                  |                             |
+------------------------------------------------+                             |
|EMERGENCY CLASS:          N/A                   |                             |
|10 CFR SECTION:                                 |                             |
|NMIN                     MINING EVENT           |                             |
|                                                |                             |
|                                                |                             |
|                                                |                             |
|                                                |                             |
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                                   EVENT TEXT                                   
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| LEAK IN BRINE POND LINER                                                     |
|                                                                              |
| The licensee has confirmed a leak in the pond liner based on an increase in  |
| the conductivity of the water between the inner and outer liners (the leak   |
| is in the inner liner).   No release to the environment has occurred.        |
| The licensee believes the leak is small based on the increase in             |
| conductivity with only a small accompanying increase in water level in the   |
| area between the liners.                                                     |
|                                                                              |
| The licensee will pump down the pond and attempt to find and repair the      |
| leak.  This could take one to two weeks.                                     |
+------------------------------------------------------------------------------+

+------------------------------------------------------------------------------+
|Other Nuclear Material                           |Event Number:   37946       |
+------------------------------------------------------------------------------+
+------------------------------------------------------------------------------+
| REP ORG:  DELAWARE EMERG MANAGEMENT AGENCY     |NOTIFICATION DATE: 04/26/2001|
|LICENSEE:  UNKNOWN                              |NOTIFICATION TIME: 17:36[EDT]|
|    CITY:  NEW CASTLE               REGION:  1  |EVENT DATE:        04/26/2001|
|  COUNTY:                            STATE:  DE |EVENT TIME:             [EDT]|
|LICENSE#:                        AGREEMENT:  N  |LAST UPDATE DATE:  04/26/2001|
|  DOCKET:                                       |+----------------------------+
|                                                |PERSON          ORGANIZATION |
|                                                |DAVID SILK           R1      |
|                                                |JOSIE PICCONE        NMSS    |
+------------------------------------------------+RICHARD WESSMAN      IRO     |
| NRC NOTIFIED BY:  DAVID HAKE                   |                             |
|  HQ OPS OFFICER:  DOUG WEAVER                  |                             |
+------------------------------------------------+                             |
|EMERGENCY CLASS:          N/A                   |                             |
|10 CFR SECTION:                                 |                             |
|NINF                     INFORMATION ONLY       |                             |
|                                                |                             |
|                                                |                             |
|                                                |                             |
|                                                |                             |
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                                   EVENT TEXT                                   
+------------------------------------------------------------------------------+
| RECOVERY OF TROXLER GAUGE                                                    |
|                                                                              |
| The Delaware Emergency Management Agency (DEMA) reported the recovery of     |
| what appears to be a Troxler moisture density gauge.  The gauge was          |
| recovered in New Castle, DE just off of I-95.  The gauge appears to be       |
| intact with the source in the shielded position.  No model or serial numbers |
| were available.  DEMA requested NRC assistance to remove the gauge.  The     |
| gauge is isolated pending resolution.                                        |
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+------------------------------------------------------------------------------+
|Power Reactor                                    |Event Number:   37947       |
+------------------------------------------------------------------------------+
+------------------------------------------------------------------------------+
| FACILITY: COOPER                   REGION:  4  |NOTIFICATION DATE: 04/26/2001|
|    UNIT:  [1] [] []                 STATE:  NE |NOTIFICATION TIME: 22:26[EDT]|
|   RXTYPE: [1] GE-4                             |EVENT DATE:        04/26/2001|
+------------------------------------------------+EVENT TIME:        17:45[CDT]|
| NRC NOTIFIED BY:  ANDREW OHRABLO               |LAST UPDATE DATE:  04/26/2001|
|  HQ OPS OFFICER:  DOUG WEAVER                  +-----------------------------+
+------------------------------------------------+PERSON          ORGANIZATION |
|EMERGENCY CLASS:          N/A                   |BILL JONES           R4      |
|10 CFR SECTION:                                 |                             |
|*IND 50.72(b)(3)(v)(D)   ACCIDENT MITIGATION    |                             |
|                                                |                             |
|                                                |                             |
|                                                |                             |
+-----+----------+-------+--------+-----------------+--------+-----------------+
|UNIT |SCRAM CODE|RX CRIT|INIT PWR|   INIT RX MODE  |CURR PWR|  CURR RX MODE   |
+-----+----------+-------+--------+-----------------+--------+-----------------+
|1     N          Y       100      Power Operation  |100      Power Operation  |
|                                                   |                          |
|                                                   |                          |
+------------------------------------------------------------------------------+
                                   EVENT TEXT                                   
+------------------------------------------------------------------------------+
| CONTROL ROOM EMERGENCY FILTRATION SYSTEM (CREFS) INOPERABLE                  |
|                                                                              |
| The licensee entered a 7 day LCO when high vibrations were noticed on the    |
| booster fan.  The fan was declared inoperable and led to CREFS being         |
| declared inoperable since it is a single train system.  Licensee intends to  |
| repair the system prior to expiration of the LCO.                            |
|                                                                              |
| The licensee notified the NRC resident inspector.                            |
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