We cover both ends. Partially because even if the filter is working, your efficiency is 99.97% so there is still the potential (no filter is perfect). Secondly because, if you do have a filter degrade or get damaged while in storage you have it covered. It's easy, cheap insurance to prevent bigger issues further down the road.
Thanks, Derek Hultquist RP Supervisor - ALARA and Instrumentation D. C. Cook (269) 465-5901 x2088 From: Lloyd, David Jay [mailto:[email protected]] Sent: Thursday, January 25, 2018 9:16 AM To: '[email protected]' Subject: [EXTERNAL] [powernet] HEPA's and Vacuums This is an EXTERNAL email. STOP. THINK before you CLICK links or OPEN attachments. If suspicious please forward to [email protected]<mailto:[email protected]> for review. ________________________________ NISP-RP-08, USE AND CONTROL OF HEPA FILTRATION AND VACUUM EQUIPMENT reads, "When not in the use, then the openings of the HEPA ventilation unit and hoses will be covered to prevent access to any potentially contaminated surface or component." My questions are; How do you interpret this statement? does your site cover both the intake and discharge ends of a HEPA unit when not in use or when being placed in storage? if you cover the discharge end, why? (since the air came through a HEPA filter). My experience is to cover both ends but, I wanted to see how the rest of the industry handles this or interprets the NISP. Thank you, Dave David J. Lloyd | Corporate Fleet Scientific Services | Senior Scientist | Duke Energy Carolinas, LLC 526 S. Church St. | Mail Stop EC07F | Charlotte, NC 28202 | 980-373-7437 office | 704-678-3603 cell [DE_Logo]
