ML20151Z689
| ML20151Z689 | |
| Person / Time | |
|---|---|
| Site: | University of Iowa |
| Issue date: | 09/14/1998 |
| From: | Wendt S IOWA STATE UNIV., AMES, IA |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| Shared Package | |
| ML20151Z691 | List: |
| References | |
| NUDOCS 9809220074 | |
| Download: ML20151Z689 (4) | |
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' IOWA STATE UNIVERSITY ',"l1*
o " '"it""i tesimemies OF SClENCE AN D TECH NOLOGY 2025 H. M. Black Engineering Building Docket No. 50-116 Arnes. Iowa 5001i.2160 l 515 294 1423 September 14,1998 fax 515 294 326:
U.S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, D.C. 20555
Subject:
Update of Technical Specifications for the Iowa State University Reactor Facility 1
Dear Sir:
l The technical specifications for the UTR-10 reactor facility are being updated to reflect the change in the need for area radiation monitors since reactor operations have I permanently ceased. It is proposed that the number of area radiation monitors be reduced from the five that were required for reactor operations to two. The two remaining area radiation monitors are required to monitor the spent fuel storage pit. A third area monitor i will be utilized as an installed spare.
It should be noted that upon NRC approval of this proposed amendment, a 10 CFR 50.59 l review is planned so that the existing area radiation monitors can be replaced with three l new, equivalent area radiation monitors. I Enclosed are three copies of the complete text of the affected section of the technical specifications with the changes incorporated. Additions have been underlined and deletions have been annotated. A separate attachment is also included as an explanation j for the changes. '
I Questions may be directed to me during normal working hours at (515) 294-0539.
Sincerely, cott E. Wendt Reactor Manager !
,co3 Enclosure 4
-07 O c: (without enclosures)
A.F. Rohach, Chm., Reactor Use Committee D.B. Bullen, Facility Director i E.E. Sobottka, Dir., Environmental Health & Safety R. A. Jacobson, Chm., Radiation Safety Committee T. Burdick, US NRC, Region III l
W.R. DeVries, Chm., Mechanical Engineering Department l 9809220074 990914 l PDR ADOCK 05000116 .
P PDR j i
CHANGE TO SECTION 3.7 OF TECHNICAL SPECIFICATIONS i i
, General Backgroy_nd During reactor operations at the UTR 10 facility five area radiation monitors are required by Technical Specifications - one on cach of the four walls surrounding the reactor and the fifth near the primary coolant de-ionizer. The purpose of the area monitors is to alert the reactor operator of elevated radiation levels in the event of an abnormal or emergency condition.
During shutdown mode, only the two of the five area monitors are required by Technical Specifications (the two that are adjacent to the fuel storage pits). The reason for the two area monitors during shutdown is to provide 24-hr notification of an inadvcitent criticality in the SNM storage location.
Since reactor operations have permanently ceased and the fuel has been removed from the reactor, only the two area monitors adjacent to the fuel storage locations are required. The Technical Specifications, however, still require that surveillance activitics continue for all of the area monitors. It is proposed that the Technical Specifications be amended by deleting references to the area radiation monitors that are NOT required to monitor the storage of SNM.
The motivating factor in amending the Technical Specification is the purchase of three new area monitors. After the proposed Technical Specification amendment is approved, it is our intent to perform a 10 CFR 50.59 review and replace the old area monitors with the new area monitors.
(Two will be required and the third will be an installed spare.)
PAGES EFFECTED BY AMENDMENT Page 3-13 Delete last paragraph on the page.
Reason for the Change:
The radiation detector located near the deionizer will be removed and will not be replaced.
Safety 1molications:
No reduction in safety results from the deletion of the radiation detector near the deionizer. The UTR 10 has been permanently shutdown, the fuel has been removed from the reactor and placed in storage, and the reactor coolant has been released. Since the reactor has been permanently shutdown, the stated purpose of detecting fission products in the coolant is no longer defined.
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CIIANGE TO SECTION 3.7 OF TECliNICAL SPECIFICATIONS (cont) l Pc.ge 3-14 Reword the first paragraph. Functions of the area radiation monitors that existed during reactor l operations would be deleted.
Reason for the Chang To specify the requirements for area radiation monitors in the LTTR-10 facility under the j conditions where the reactor has permanently ceased operations. l SafetyImplicatips Since the reactor has been permanently shutdown, no reduction in safety results from deleting references to equipment that is no longer required.
Page 3-15 Edit Table 3-3. Delete reference to Deionizer unit. Delete footnotes (b), (c) and (d). Delete references to 50 mR/hr and footnotes (b), (c) and (d). Change minimum operable value from 4 to 2 units.
Beason for the Chance:
To specify the requirements for area radiation monitors in the UTR 10 facility under the conditions where the reactor has permanently ceased operations.
Safety Imolications:
Since the reactor has been pennanently shutdown, no reduction in safety results from deleting references to equipment that is no longer required.
F I
I Technical Specification (New)
Section 3.7 l Amendment # 13 - Proposed i
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