Event Notification Report for July 29, 2003
U.S. Nuclear Regulatory Commission
Operations Center
Event Reports For
07/28/2003 - 07/29/2003
** EVENT NUMBERS **
40025 40028 40029
!!!!!!!!! THIS EVENT HAS BEEN RETRACTED. THIS EVENT HAS BEEN RETRACTED !!!!!!!
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|Power Reactor |Event Number: 40025 |
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| FACILITY: CALLAWAY REGION: 4 |NOTIFICATION DATE: 07/28/2003|
| UNIT: [1] [] [] STATE: MO |NOTIFICATION TIME: 14:05[EDT]|
| RXTYPE: [1] W-4-LP |EVENT DATE: 07/28/2003|
+------------------------------------------------+EVENT TIME: 12:12[CDT]|
| NRC NOTIFIED BY: DAVID LANTZ |LAST UPDATE DATE: 07/28/2003|
| HQ OPS OFFICER: GERRY WAIG +-----------------------------+
+------------------------------------------------+PERSON ORGANIZATION |
|EMERGENCY CLASS: NON EMERGENCY |MARK SHAFFER R4 |
|10 CFR SECTION: |ROBERTA WARREN DNS |
|DDDD 73.71(b)(1) SAFEGUARDS REPORTS | |
| | |
| | |
| | |
+-----+----------+-------+--------+-----------------+--------+-----------------+
|UNIT |SCRAM CODE|RX CRIT|INIT PWR| INIT RX MODE |CURR PWR| CURR RX MODE |
+-----+----------+-------+--------+-----------------+--------+-----------------+
|1 N Y 100 Power Operation |100 Power Operation |
| | |
| | |
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EVENT TEXT
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| SAFEGUARDS 1-HOUR REPORT |
| |
| The licensee discovered a vulnerability in a safeguard system that could |
| allow access to a controlled access area for which compensatory measures |
| have not been employed. The licensee will notify the NRC Resident Inspector. |
| Contact the Headquarters Operations Officer for additional details. |
| |
| * * * RETRACTION ON 7/28/03 AT 1743 EDT FROM DAVID LANTZ TO GERRY WAIG * * |
| * |
| |
| "Consistent with guidance outlined in Generic Letter 91-03, Reporting of |
| Safeguards Events, this call [event] is being retracted." The licensee has |
| notified the NRC Resident Inspector. |
| |
| Notified R4DO (Mark Shaffer), TAT (Roberta Warren). |
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|Other Nuclear Material |Event Number: 40028 |
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| REP ORG: MFG, INC. |NOTIFICATION DATE: 07/28/2003|
|LICENSEE: MFG, INC. |NOTIFICATION TIME: 18:34[EDT]|
| CITY: COEUR d'ALENE REGION: 4 |EVENT DATE: 07/28/2003|
| COUNTY: STATE: ID |EVENT TIME: 15:00[MDT]|
|LICENSE#: AGREEMENT: N |LAST UPDATE DATE: 07/28/2003|
| DOCKET: |+----------------------------+
| |PERSON ORGANIZATION |
| |MARK SHAFFER R4 |
| |JOHN GREEVES NMSS |
+------------------------------------------------+ |
| NRC NOTIFIED BY: KEVIN YRJANA | |
| HQ OPS OFFICER: STEVE SANDIN | |
+------------------------------------------------+ |
|EMERGENCY CLASS: NON EMERGENCY | |
|10 CFR SECTION: | |
|NINF INFORMATION ONLY | |
| | |
| | |
| | |
| | |
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EVENT TEXT
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| POTENTIALLY DAMAGED TROXLER MOISTURE DENSITY GAUGE |
| |
| At approximately 1500 PDT on 7/28/03 a rubber tire compactor ran over a |
| Troxler Model 3440, Serial No. 31827, gauge containing an 8 millicurie |
| Cs-137 and a 40 millicurie Am-241:Be source. The sources were in the safe |
| position at the time the incident occurred. The licensee performed rad |
| surveys and did not observe any abnormal rad readings. The manufacturer was |
| contacted and requested a photograph to evaluate any potential damage. |
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|Power Reactor |Event Number: 40029 |
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| FACILITY: PALO VERDE REGION: 4 |NOTIFICATION DATE: 07/29/2003|
| UNIT: [] [] [3] STATE: AZ |NOTIFICATION TIME: 01:42[EDT]|
| RXTYPE: [1] CE,[2] CE,[3] CE |EVENT DATE: 07/28/2003|
+------------------------------------------------+EVENT TIME: 18:54[MST]|
| NRC NOTIFIED BY: Dan Marks |LAST UPDATE DATE: 07/29/2003|
| HQ OPS OFFICER: ERIC THOMAS +-----------------------------+
+------------------------------------------------+PERSON ORGANIZATION |
|EMERGENCY CLASS: NON EMERGENCY |MARK SHAFFER R4 |
|10 CFR SECTION: | |
|ARPS 50.72(b)(2)(iv)(B) RPS ACTUATION - CRITICA| |
|AESF 50.72(b)(3)(iv)(A) VALID SPECIF SYS ACTUAT| |
| | |
| | |
+-----+----------+-------+--------+-----------------+--------+-----------------+
|UNIT |SCRAM CODE|RX CRIT|INIT PWR| INIT RX MODE |CURR PWR| CURR RX MODE |
+-----+----------+-------+--------+-----------------+--------+-----------------+
| | |
| | |
|3 A/R Y 98 Power Operation |0 Hot Standby |
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EVENT TEXT
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| RPS ACTUATION, SPECIFIED SYSTEM ACTUATION |
| |
| "On July 28, 2003, at approximately 18:54 Mountain Standard Time (MST) Palo |
| Verde Unit 3 experienced an automatic reactor trip on low DNBR [Departure |
| from Nucleate Boiling Ratio] from approximately 98% rated thermal power due |
| to reduced reactor coolant system flow when the main turbine tripped during |
| a grid perturbation. Unit 3 was at normal temperature and pressure prior to |
| the trip. All CEAs inserted fully into the reactor core. This was an |
| uncomplicated reactor trip. No emergency classification was required per the |
| Emergency Plan. No automatic ESF actuations occurred and none were required. |
| The operators initiated a manual Main Steam Isolation System (MSIS) |
| actuation, in accordance with the emergency operations procedures in |
| response to the loss of forced reactor coolant system flow. Safety related |
| buses remained energized during and following the reactor trip. The |
| Emergency Diesel Generators did not start and were not required. The offsite |
| power grid is stable. No significant LCOs have been entered as a result of |
| this event. No major equipment was inoperable prior to the event that |
| contributed to the event. |
| |
| "Unit 3 is stabilizing at approximately 520 degrees F and 2150 psia pressure |
| in Mode 3. The reactor coolant system remains in natural circulation with |
| heat removal via the atmospheric dump valves and feedwater from the |
| essential auxiliary feedwater system. The event did not result in any |
| challenges to fission product barriers and there were no adverse safety |
| consequences as a result of this event. The event did not adversely affect |
| the safe operation of the plant or the health and safety of the public. |
| |
| "Palo Verde Units 1 and 2 also observed the grid perturbation, but are |
| continuing to operate in Mode 1 at approximately 98% rated thermal power. |
| The cause of the perturbation is believed to be associated with switching in |
| a nearby Hassayampa yard by Salt River Project. A fossil power plant in the |
| vicinity also tripped off line during the grid perturbation event. |
| |
| "The [NRC] Senior Resident Inspector was informed of the Unit 3 reactor trip |
| and this notification. The Senior Resident Inspector has arrived on-site to |
| observe response to the reactor trip." |
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Page Last Reviewed/Updated Thursday, March 25, 2021
Page Last Reviewed/Updated Thursday, March 25, 2021