ML110120042
| ML110120042 | |
| Person / Time | |
|---|---|
| Site: | 05000113 |
| Issue date: | 01/07/2011 |
| From: | Linh Tran Univ of Arizona |
| To: | Glenna Lappert Research and Test Reactors Licensing Branch |
| tran L, NRC/NRR/DPR/PRLB 415-4103 | |
| References | |
| TAC ME2989 | |
| Download: ML110120042 (1) | |
Text
From: Tran, Linh Sent: Tuesday, January 11, 2011 2:10 PM To: Lappert, Glenna
Subject:
FW: University of Arizona Research Reactor Decommissioning Hi Glenna, This is the 1/72011 email from UAZ. Please place in ADAMS as discussed.
- Thanks, Linh
Original Message-----
From: jgw@email.arizona.edu arizona.edu
Sent: Friday, January 07, 2011 4:35 PM To: Tran, Linh Cc: Robert Offerle; Caroline M. Garcia
Subject:
Re: University of Arizona Research Reactor Decommissioning
Dear Linh,
This is to follow up on our telephone conversation of today.
You mentioned several revisions that you propose to make in the license in sections 2c1, 2c3 and 2d1. I agree that those are suitable.
You also mentioned changes needed in our revised Tech Specs, as follows.
3.1 (in response to Mr Isaac's concern that there is no basis stated)
The specification states that "the reactor shall not be operated." We had not realized that there is a need to state the basis for this. We propose to add:
"Basis The safety limit cannot be exceeded if the reactor is not operated."
4.1 (in response to Mr Isaac's concern about the basis) The basis statement was unchanged from our current Tech Specs. It says: "The most severe stresses induced in the fuel elements result from pulse operation with high reactivity input, during which differential expansion between the fuel and the cladding occurs and the pressure of the gases within the elements increases sharply.
The above limits on the allowable distortion of a fuel element correspond to strains that are considerably lower than the strain expected to cause rupture of a fuel element."
Because all operations, including pulsing, are suspended, we propose to delete the first sentense of the above, and retain the second.
4.5 (in response to Mr Isaac's concern about the unspecified "specified limits".
Note that this entire section is now moot, because it only applies "until all fuel is permanently removed.") We propose to revise specification 1 of 4.5 to read:
"1. The height of the bulk coolant water above the core structure shall
be measured at least monthly and verified to be not less than 14 feet."
Mr. Isaac is correct: we deleted in section 3.1 the following specification:
"The conductivity of the coolant water, averaged over 30 days, does not exceed 5 micromhos/cm."
We propose to revise specification 3 of 4.5 to read:
"3. The conductivity of the coolant water, averaged over 30 days, shall not exceed 5 micromhos/cm. The conductivity of bulk coolant water shall be verified at least monthly."
I think the bases stated in this section are adequate.
I hope that I correctly captured the concerns that you conveyed and that the above proposed revisions will meet them. If so, I can send you on Monday a complete revised document including the above changes.
Thank you for your attention to our request.
John Williams Director, Nuclear Reactor Laboratory University of Arizona 520 621-9729 Quoting jgw@email.arizona.edu:
> Ms. Linh Tran
> US Nuclear Regulatory Commission
Dear Linh,
> Happy New Year.
> One of our first tasks this year is to review bids for the
> decommissioning of our reactor. The submitted bids will be opened on
> Jan 5. You can see the Request for Proposals at http://www.pacs.arizona.edu/RFP-BID_Opportunities .
> The RFP is based on our D-Plan, which is still awaiting approval from
> NRC. I think we are going to need that approval in hand before we can
> issue a contract.
> Another hurdle is the review and approval of our Radiological
> Characterization Report, which we submitted in October. (ADAMS no
> ML102930034). Our submitted Tech Specs revision (ADAMS ML102250248
> and further revisions ML102710269 and
> ML102920134) commits in Section 7.3 that: " A completed radiological
> characterization report shall be submitted to NRC review and approval
> prior to initiating decommissioning activities."
> The University is committed to moving ahead as soon as possible to
> complete our decommissioning. We hope that NRC approval of our plans
> will be received in the near future.
> Thank you,
> John Williams
> Director, Nuclear Reactor Laboratory
> University of Arizona
> 520 621-9729 E-mail Properties Mail Envelope Properties (E09C30551FD42442BA284ECF9858105F8C200A7FE1)
Subject:
FW: University of Arizona Research Reactor Decommissioning Sent Date: 1/11/2011 2:09:34 PM Received Date: 1/11/2011 2:09:34 PM From: Tran, Linh Created By: Linh.Tran@nrc.gov Recipients:
Glenna.Lappert@nrc.gov (Lappert, Glenna)
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