Sotera Health's Nordion completes the sale of its medical isotopes business to BWXT

Nordion's increased focus on gamma technologies supports Sotera Health's company-wide commitment to Safeguarding Global Health™

BROADVIEW HEIGHTS,Ohio,Aug.7,2018 --Sotera Health LLC,the world's leading,fully integrated protector of global health,today announced the closing of the sale of the Medical Isotopes segment within its Nordion business to BWX Technologies,Inc. (BWXT).

With the sale,BWXT now owns Nordion's former medical isotopes business,including the radiochemical and contract manufacturing operations in Kanata,Ontario,and the isotope production facility in Vancouver,British Columbia,along with transfer of approximately 150 employees. Nordion retains ownership of its gamma technologies business as well as its state-of-the-art licenced facility in Kanata. Separately,the companies also signed a long-term lease agreement that will allow BWXT to continue operating from Nordion's Kanata facility.

"We are seeing significant growth and new business opportunities for gamma technologies,especially in the exciting new therapeutic applications that are emerging for medical cobalt-60," said Michael Petras,Chief Executive Officer of Sotera Health. "This sale allows Nordion to focus its full attention on accelerating growth in gamma technologies to bring our customers additional value in support of our Sotera Health mission,Safeguarding Global Health™."

About Sotera Health:

Sotera Health LLC,along with its business entities,is the world's leading,fully integrated protector of global health. With over 500 years of combined scientific expertise,the company ensures the safety of healthcare by providing mission-critical services to the medical device,pharmaceutical,tissue and food industries. Sotera Health operates 61 facilities in 13 countries. The company has over 2,600 employees globally and touches the lives of more than 180 million people around the world each year. Sotera Health serves more than 5,000 customers worldwide including 75 of the top 100 medical device manufacturers.

Sotera Health goes to market through its three best-in-class companies – Nelson Labs™,Nordion® and Sterigenics® – with the mission of ensuring the safety of healthcare each and every day. Nelson Labs offers microbiological and analytical testing and expert advisory services to assist customers in developing and maintaining sterilization solutions in medical devices,tissue/implantable products,and the pharmaceutical and biologics fields. Nordion is the world's largest provider of Cobalt-60 used in the gamma sterilization process and the treatment of various diseases and cancers. Sterigenics provides comprehensive contract sterilization and ionization solutions for the medical device,food safety and high-performance materials industries.

Sotera Health LLC is owned by private equity firms Warburg Pincus and GTCR. Learn more about Sotera Health at soterahealth.com,about Nelson Labs at nelsonlabs.com,about Nordion at nordion.com and about Sterigenics at sterigenics.com.

Contacts:

Dan Pfeffer

Public Affairs Advisors

343-883-5559

dan.pfeffer@publicaffairsadvisors.com

Kristin A. Gibbs

Chief Marketing Officer

Sotera Health LLC

440-262-1412

kgibbs@soterahealth.com