Nuclear Power and Public Safety
Emergency Planning for the Calvert Cliffs Area
Special plans have already been developed to protect the public in the event of a nuclear incident in your area. These plans give specific attention to people who – like you – live, work or visit within 10 miles of a nuclear power plant, the Emergency Planning Zone (EPZ). Procedures are in place to help protect you and other members of the public in the unlikely event of a nuclear emergency. If necessary, area officials would declare an emergency and take measures to ensure public safety.
This site addresses procedures for the Calvert Cliffs area. Please read and keep this material for future reference. Although it specifically addresses a potential nuclear accident, much of the information is useful in any major emergency.
Benefits and Potential Risks of Nuclear Power
Used properly, nuclear fission (the “splitting” of uranium atoms) is a safe, dependable source of electricity. It is reasonable, though, to be concerned about what might happen in the event of a serious incident at a power plant. A power plant reactor cannot produce a nuclear explosion. The uranium fuel contains very little fissionable material. The complex structure of a nuclear power plant is designed to prevent the release of radiation. A serious incident, however, could allow some radiation to escape, most likely as a cloud, or “plume,” of radioactive steam that would be carried away from the plant by the wind. The degree of risk to the public would depend on the size of the plume, the direction and speed of the wind, and other factors.
Warning Sirens
If you hear a siren, you should tune to one of the Emergency Alert System (EAS) stations listed in this site for official information. The sirens are full volume tested semi-annually in June and December. A monthly test is also conducted which operates the sirens for less than one minute. A siren may malfunction and inadvertently sound. If you feel a siren is malfunctioning, please contact your county emergency management officials at the numbers below:
Calvert County: 410.535.3491
St. Mary’s County: 301.475.8016
Dorchester County: 410.228.2222
Public Inquiry Telephone Numbers (During Emergencies Only)
Calvert County: 410.535.0314 and 410.535.0396
St. Mary’s County: 301.475.4911
Dorchester County: 410.228.6988
Click here to see the EAS Stations
Siren Malfunction
A siren may malfunction and inadvertently sound. Some indications of a siren malfunction are a siren sounding for more than five minutes, or a siren sounding with no accompanying message on the Emergency Alert System.
People with Access and Functional Needs
Local authorities have plans to assist and care for people who have access and functional needs. Anyone who lives within 10 miles of the plant and has access and functional needs should contact the County Emergency Management Agency office by calling:
Calvert County: 410.535.1600, ext. 2638
St. Mary’s County: 301.475.4200 *2124
Dorchester County: 410.228.1818
Note: If you or someone you know might not respond to warning sirens or radio broadcasts due to impaired hearing or other factors, please use the attached reply card to notify local authorities now.
Potassium Iodide (KI)
Potassium Iodide (KI) is a nonprescription drug that may prevent the thyroid from absorbing radioactive iodine. KI is one type of protective action that may be recommended during a nuclear incident. KI should only be taken at the direction of the appropriate state and local authorities. Consult your physician if you have concerns about the safety of KI for your child or yourself.
KI is effective in blocking the absorption of radioactive iodine only. Since it does not block the absorption of any other radioactive material, evacuation or sheltering in place may be the most effective and preferred protective actions.
Calvert County Health Department: 410.535.5400
St. Mary’s County Health Department: 301.475.4330
Dorchester County Health Department: 410.228.3223
Classification of Accidents
Should an accident occur at the Calvert Cliffs Nuclear Power Plant, there are four accident classifications you might hear reported on the radio or TV, or read about in the newspapers.
Unusual Event — A situation is in progress or already completed which could potentially degrade the plant’s level of safety or indicate a security threat to the facility. No releases of radioactive material requiring offsite actions are expected unless safety systems degrade further.
Alert — Events are in progress or have occurred which have (or could) substantially degrade the plant safety; or, a security event that could threaten site personnel or damage to site equipment is in progress. Any offsite releases of radioactive material that could occur are expected to be minimal and far below limits established by the Environmental Protection Agency’s (EPA) protective action guides (PAGs).
Site Area Emergency — Events are in progress or have occurred which have caused (or likely will cause) major failures of plant functions that protect the public, or involve security events with intentional damage or malicious acts that could lead to the likely failure of (or prevent effective access to) equipment needed to protect the public. Any offsite releases of radioactive material are expected to remain below EPA PAG exposure levels beyond the site boundary.
General Emergency — Events are in progress or have occurred which: A) have caused (or shortly will cause) substantial reactor core damage, with the potential for uncontrolled releases of radioactive material; or, B) involve security events that deny plant staff physical control of the facility. Offsite releases can be reasonably expected to exceed EPA PAG exposure levels beyond the plant site.
What You Need to Know About Nuclear Power Plants and Radiation
How Do Nuclear Plants Work?
Power plants create electricity by running steam turbines, which are powered either by fossil fuels – coal, oil, natural gas – or by nuclear power. Nuclear technology produces energy by splitting uranium atoms in a process called fission. Fission generates heat that boils water for the steam that runs the turbines, which produce the electricity that we all use.
In a nuclear power plant, pea-sized uranium pellets are stacked inside long, thin fuel rods, which are grouped in “assemblies” inside a reactor “core”. The core is encased in a very thick steel capsule, and the entire reactor is further protected by an airtight steel and concrete building called a “containment”. This complex structure is designed to help ensure the safe utilization of nuclear power.
How Do We All Benefit from Nuclear Power?
Any fuel used to produce energy also produces waste. By-products of coal-burning include smoke, ashes and slag. Even with the latest technologies, it is impossible to prevent some of this waste from reaching the environment outside the power plant. Nuclear power generation, on the other hand, produces waste primarily in the form of spent fuel, which is not released into the environment. Besides helping to protect the environment, nuclear energy is also highly efficient, producing vastly more energy for its weight than coal or oil. We would have to burn more than 120 gallons of oil or up to a ton of coal to produce the same amount of energy as that found in a single pellet of uranium.
What Is Radiation?
Radiation is energy in the form of rays or particles. Some atoms – the ones we call radioactive – are unstable. As they go through a natural process called “decay” in which they change into a stable atom, they throw off rays or particles called radiation. Radiation is exactly the same, whether from nature, or medical or industrial activities.
Radiation is measured in millirems. On average, a person receives about 300 millirem of radiation annually from natural sources and another 300 millirem or so from X-rays and other medical procedures. It takes more than 35 times this much — over 20,000 millirem in a single day — to produce identifiable effects in the body. Federal regulations allow workers to receive up to 5,000 millirem of radiation in the course of a year’s work.
For More Information, Please Visit:
www.calvertcountymd.gov/101/em
www.stmarysmd.com/es
https://dorchestercountymd.com/emergency-services-main/
https://mdem.maryland.gov/Pages/default.aspx