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Responds to 890726 ltr re containment mod to install hardened vents not being immediately implemented at plant. Concludes that NRC need not immediately require all plants w/Mark I containments to install hardened vents.

Accession Number: ML20246M379

Date Released: Wednesday, September 16, 2020

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• ML20246M376 - Responds to 890726 ltr re containment mod to install hardened vents not being immediately implemented at plant. Concludes that NRC need not immediately require all plants w/Mark I containments to install hardened vents. (1 page(s), 8/17/1989)
• ML20246M383 - Responds to 890720 ltr re constituent JT Shaff concern that containment mod to install hardened vents not being immediately implemented at plant.Concludes that NRC need not immediately require all plants to install hardened vents. (1 page(s), 8/17/1989)