UHI: In 1984 INPO told NRC's AEOD that it had no concern with stored gases.

It is just as well that INPO told the NRC that it had no interest. I've looked at the report that NRC's now defunct office of Analysis and Evaluation of Operating Data (AEOD) sent to INPO. Below is INPO's letter to NRC dated November 26, 1984.

And next is the abstract of the ORNL report.
ORNL found that if Nuclear Power Plants complied with "... well-known and established ..." methods, the nuclear power plants would have no problems in this arena. ORNL apparently complied with AEOD specifications in producing its report that was completed in April 1985 although INPO was invited to review a draft on November 9, 1964. AEOD's specifications to ORNL should have included UHI accumulators and ECCS accumulators. However, such a specification was beyond the experience. insight and talent at AEOD.

I've checked the NRC's Public Document Room and I find no evidence that EPRI's NSAC was invited to review the ORNL document even though there was a Memorandum of Understanding that such documents would be discussed with NSAC. Of course, even if NSAC would have been invited to look at the ORNL report, it is unlikely that I would have had a shot at it.