Event Notification Report for August 1, 2000
U.S. Nuclear Regulatory Commission
Operations Center
Event Reports For
07/31/2000 - 08/01/2000
** EVENT NUMBERS **
37199 37200
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|Power Reactor |Event Number: 37199 |
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| FACILITY: ARKANSAS NUCLEAR REGION: 4 |NOTIFICATION DATE: 07/30/2000|
| UNIT: [] [2] [] STATE: AR |NOTIFICATION TIME: 18:39[EDT]|
| RXTYPE: [1] B&W-L-LP,[2] CE |EVENT DATE: 07/30/2000|
+------------------------------------------------+EVENT TIME: 16:35[CDT]|
| NRC NOTIFIED BY: TOM MOSBY |LAST UPDATE DATE: 07/31/2000|
| HQ OPS OFFICER: STEVE SANDIN +-----------------------------+
+------------------------------------------------+PERSON ORGANIZATION |
|EMERGENCY CLASS: N/A |BILL JONES R4 |
|10 CFR SECTION: | |
|ADAS 50.72(b)(2)(i) DEG/UNANALYZED COND | |
| | |
| | |
| | |
+-----+----------+-------+--------+-----------------+--------+-----------------+
|UNIT |SCRAM CODE|RX CRIT|INIT PWR| INIT RX MODE |CURR PWR| CURR RX MODE |
+-----+----------+-------+--------+-----------------+--------+-----------------+
| | |
|2 N N 0 Cold Shutdown |0 Cold Shutdown |
| | |
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EVENT TEXT
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| INDICATION OF REACTOR COOLANT LEAKAGE ON PRESSURIZER HEATER PENETRATIONS |
| |
| "Boron was discovered on the reactor coolant system (RCS) pressurizer heater |
| power cables. An inspection of the heater sleeves was performed and it |
| appears that two heaters (B2 and D2) are leaking. B2 is on backup heater |
| bank #4 and D2 is on backup heater bank #6. The leakage appears to be the |
| result of primary water stress corrosion cracking (PWSCC) of either the |
| heater sleeve or the J-groove weld between the heater sleeve and the |
| pressurizer cladding. The insulation will need to be removed to positively |
| determine which heater sleeve(s) had been leaking. Currently, Unit 2 is in |
| reduced inventory with the pressurizer empty. The pressurizer heater sleeve |
| penetrations were inspected during 2R-13 [between 1/9/99 and 2/25/99] as |
| part of the routine I-600 inspections performed each refueling outage. No |
| indication of leakage was evident during that inspection. Pressurizer |
| heater sleeve leakage is considered RCS pressure boundary leakage." |
| |
| The licensee notified the NRC Resident Inspector. |
| |
| * * * UPDATE AT 0052 ON 07/31/00 BY LARRY McLERRAN TO JOLLIFFE * * * |
| |
| After removing insulation from the pressurizer and RCS hot legs, the |
| licensee discovered 9 or 10 additional pressurizer heater sleeves that are |
| leaking and also a hot leg temperature element (TE) that is leaking. The |
| licensee is continuing to inspect the hot leg penetrations for evidence of |
| leakage. |
| |
| The licensee notified the NRC Resident Inspector. The NRC Operations |
| Officer notified R4DO Bill Jones. |
| |
| * * * UPDATE AT 0829 ON 07/31/00 BY WAYNE AHO TO JOLLIFFE * * * |
| |
| The licensee discovered indications on RCS hot leg TE #2TE-4710-3 that is |
| indicative of a RCS pressure boundary leak. The TE is installed above the |
| water line in the 'B' hot leg on the reactor coolant pump #2P-32C side. The |
| licensee is continuing to inspect the hot leg penetrations for evidence of |
| leakage. |
| |
| The licensee plans to notify the NRC Resident Inspector. The NRC Operations |
| Officer notified R4DO Bill Jones. |
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|Power Reactor |Event Number: 37200 |
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| FACILITY: CLINTON REGION: 3 |NOTIFICATION DATE: 07/31/2000|
| UNIT: [1] [] [] STATE: IL |NOTIFICATION TIME: 12:11[EDT]|
| RXTYPE: [1] GE-6 |EVENT DATE: 07/31/2000|
+------------------------------------------------+EVENT TIME: 10:18[CDT]|
| NRC NOTIFIED BY: ROBERT POWERS |LAST UPDATE DATE: 07/31/2000|
| HQ OPS OFFICER: DOUG WEAVER +-----------------------------+
+------------------------------------------------+PERSON ORGANIZATION |
|EMERGENCY CLASS: N/A |JAMES CREED R3 |
|10 CFR SECTION: | |
|AESS 50.72(b)(1)(v) EMERGENCY SIREN INOP | |
| | |
| | |
| | |
+-----+----------+-------+--------+-----------------+--------+-----------------+
|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
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| EMERGENCY SIRENS INOPERABLE |
| |
| On 7/31/00, a system test of the emergency sirens was conducted. During |
| this test it was discovered that a large number of emergency sirens are not |
| functioning. It is believed that the sirens are not functional due to a |
| lightning strike which occurred during storms which passed through the area |
| last night. |
| |
| The licensee notified the NRC resident inspector and Dewitt County. |
| |
| * * * UPDATE AT 2317 ON 7/31/00 BY FUNKHOUSER RECEIVED BY WEAVER * * * |
| |
| The sirens were restored at approximately 1600 CDT on 7/31/00. The licensee |
| notified the NRC resident inspector. The NRC Operations Officer notified |
| the R3DO (Jim Creed). |
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