ML22301A140
| ML22301A140 | |
| Person / Time | |
|---|---|
| Site: | Three Mile Island  |
| Issue date: | 10/28/2022 |
| From: | Kenneth Kolaczyk, Jure Kutlesa NRC/RGN-III/DRSS/SEPIR, NRC/NRR/DRO/IRAB |
| To: | |
| References | |
| Download: ML22301A140 (37) | |
Text
February 7, 1993 Vehicle Intrusion at Three Mile Island (TMI) 31 October 2022 1
Disclaimer This training session is being recorded for future use in the NRCs knowledge management program. The recorded contents of the session, including any questions posted by audience members, will be preserved in accordance with the NRCs record management program and are subject to FOIA disclosure. Please refrain from including any sensitive information (i.e., SUNSI/SGI) in any questions that you may ask.
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2
Designation
- Discussion: Non Designated
- Powerpoint: Non Designated We will not discuss Safeguards Information or Security Related Information.
31 October 2022 3
2 Takeaways
- 1. NRC updated Security Design Basis Threat (DBT - 10 CFR 73.1(a))
- 2. NRC required Vehicle Barrier Systems 31 October 2022 4
Definitions Significant Operational Event (MD 8.3 NRC Incident Investigation Program)
- Any radiological, safeguards, or other safety-related operational event that poses an actual or a potential hazard to public health and safety, property, or the environment.
IIT - Incident Investigation Team (MD 8.3 NRC Incident Investigation Program)
- Investigatory response for a significant event is defined by its risk significance, complexity, and generic safety or security implications.
- IIT must consider whether licensee and NRC activities preceding and during the event were timely and adequate.
31 October 2022 5
Definitions OCA - Owner Controlled Area
- Licensees property
- Outside Protected Area
- Not considered part of physical protection PA - Protected Area
- Encompassed by physical barriers
- Identification and search of all vehicles, individuals and packages VA - Vital Area
- Contains vital equipment that, if fail, may endanger the public by exposure to radiation
- Requires access through 2 physical barriers 31 October 2022 6
Nuclear Plant Security Zones Owner Controlled Area Protected Area Double Fence Protected Area Vital Area Checkpoints 31 October 2022 7
TMI Location 31 October 2022 8
TMI Location Three Mile Island 31 October 2022 9
Three Mile Island 31 October 2022 10
Timeline: February 7, 1993
- 6:53 am-Intruder drives into the OCA via North entrance at 35-40mph
- Drives through 2 stop signs
- Passes PA processing center 31 October 2022 11
The Intruder - Pierce Nye
- 31-year-old Caucasian male
- Lived 56 miles northwest of TMI
- No history of violence or arrests
- Had been admitted to hospitals for depression:
- Most recent hospitalization - involuntary admission on January 18, 1993
- Released on January 22, 1993
- Event occurred on February 7, 1993 31 October 2022 12
Intruders Route 31 October 2022 13
Route North Gate 31 October 2022 14
Route Time - 68 sec 31 October 2022 15
Turbine 1 Door 31 October 2022 16
Turbine 1 Door 31 October 2022 17
Timeline: February 7, 1993
- Intruder goes through PA fence (causes alarm)
- Through aluminum door into Unit 1 Turbine Building 31 October 2022 18
PA Gate #1 31 October 2022 19
PA Gate #1 31 October 2022 20
Turbine Building Door 31 October 2022 21
Turbine Building Door 31 October 2022 22
Timeline: February 7, 1993
- 7:05 am - TMI declares Site Area Emergency
- 10:57 am - Intruder apprehended by TMI Security (Randy Patterson-RII) 31 October 2022 23
Turbine Floor Plan 31 October 2022 24
Turbine Building 31 October 2022 25
31 October 2022 26 Intruders Location 31 October 2022 27
31 October 2022 28 Regulatory Requirements 10 CFR § 73 - Physical Protection of Plants and Materials
- 73.1 (a) Purpose. This part prescribes requirements for the establishment and maintenance of a physical protection system which will have capabilities for the protection of special nuclear material at fixed sites and in transit and of plants in which special nuclear material is used. The following design basis threats, where referenced in ensuing sections of this part, shall be used to design safeguards systems to protect against acts of radiological sabotage and to prevent the theft or diversion of special nuclear material.
31 October 2022 29
Safety Significance
- Performance objectives of 10 CFR § 73 did not effectively address the use of a vehicle for entering the protected area in a manner similar to the TMI event
- Method of entry into the protected area significantly affected the security program response strategy toward protecting the vital areas and protecting against radiological sabotage
- NRC had not effectively defined and communicated its expectations for the licensee's security program performance in response to vehicle intrusions 31 October 2022 30
Additional Incident
- February 26, 1993:
Bomb exploded in the World Trade Center parking garage.
31 October 2022 31
1988 vs 1994 Security Design Basis Threat (DBT) 31 October 2022 32
Results
- NRC modified the design basis threat for radiological sabotage to include:
- (1) use of a land vehicle by adversaries for transporting personnel and their hand equipment to the proximity of vital areas
- (2) use of a land vehicle bomb
- NRC required licensees to install vehicle barrier systems (94 Barrier) 31 October 2022 33
RG 5.68 (August 1994) 31 October 2022 34
Questions?
31 October 2022 35
Contacts
- Jure Kutlesa, RIII Security/EP Inspector jure.kutlesa@nrc.gov
- Randy Patterson, RII Security Inspector randy.patterson@nrc.gov 31 October 2022 36
References
- NUREG-1485 (IIT Report) - Unauthorized forced entry into the protected area at Three Mile Island Unit 1 on February 7, 1993
- NUREG-1485 (SGI) - NS101328
- NRC Information Notice 93-94 (Public Site)
- NUREG-0933 - ISSUE 177: Vehicle Intrusion at TMI (Public Site)
- MD 8.3 - NRC Incident Investigation Program 31 October 2022 37