ML20062J175
| ML20062J175 | |
| Person / Time | |
|---|---|
| Issue date: | 02/11/1992 |
| From: | Miraglia F Office of Nuclear Reactor Regulation |
| To: | Murley T Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML20059F318 | List: |
| References | |
| FOIA-93-230 NUDOCS 9208280213 | |
| Download: ML20062J175 (2) | |
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t NUCLEAR REGULATORY COMMISSION
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MEMORAN9UM FOR: Thomas E. Murley, Director Office of Nuclear Reactor Regulation s
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Frank J Miraglia, Deputy Director JJ' Office of Nuclear Reactor Regulation g
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SPECIAL' REVIEW ASSIGNMENT OF POTENTIAL SAFETY y
SUBJECT:
j4 CONCERNS REGARDING THERMO-LAG FIRE BARRIERS
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REFERENCE:
Memorandum from T. Murley to F. Miraglia, "Special 66 X Review Assignment and Plan for Response to Allegations of h8
- Potential Safety Concerns Regarding Thermal Science, Inc,"
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dated August 15, 1991 W
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~ ri Attached is the NRR Special Review Team' final report that documents the findings and recommendations regarding the Thermo-Lag fire barrier technical a
issues. A large volume of documents have bten reviewed and five site visits y
were conducted to understand the safety issues and to review the allegations.
The primary objective of the review team, to identify any issues of safety 5
.M significance that could affect the continued safe operation of those plants 7.y using Thermo-Lag, has been completed using the g'ildelines provided in the
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The review team found ~ sufficient, technical information to justify issuance of hty '
a generic letter requiring licensees to confirm the adequacy of the Thermo-Lag i
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fire barriers installed to meet"10 CFR Section 50.48..The proposed generic l
'M letter is enclosed with'the? final! report. 9 Although the technical issues l
identified were not judged to'be of an immediate safety concern, NRC action is 5
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necessary to assure compliance with NRC regulations.
In addition, site specific safety concerns may exist regarding.the technical issues identified.
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The majority of the technicaluissues regarding the adnquacy of the prev 5s
- pt fire endurance and ampacityJderating' testing can be resolved by conducting testing. Therefore, the review team recommends that the industry conduct fire
~ ;s endurance and ampacity testing' to confirm the adequacy of Thermo-Lag. Other f
testing options are also discussed.in the final report.
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g Several programmatic issues were identified during the course of the review Y.4 and are discussed in the final report. We recommend these issues be assigned J,[,
to the cognizant NRR division for further review and corrective action, if tg necessary.
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Sincethe'SpecialReview3 Team'ha~scompleted that the responsibility 1forlf llowup;revief,their primary task, I recommend activities of,the technical rA i
concernsbetransferredtoithe{0ivisi'oniof.:SystemsiTechnologyfollowingyour
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review of the attached reportfdkirnp'repara' tion.for the transfer, a meeting was e
8 held on January 21, 1992,1betweenithe NRR technical staff and the Office of g;j'"
the Inspector General,gi /gg/gp
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The line organization that wil.1 be. responsible for pursuing the Thermo-Lag
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issues is as follows:
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Frank J. Miraglia, Deputy Director, HRR William T. Russell, Associate Director
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i for Inspection and Technical Assessment
'M Ashok Thadani, Director, Division of Systems Technology Conrad McCracken, Chief, Piknt Systems Branch i.'
Ralph Architzel, Chief, Plant Systems Section l'
Pat Madden, Senior Fire Protection Engineer
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The review team is prepared t6 discuss any specific issues discussed in the report, if necessary..f{l:gy@y.f;. jl,. L.
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d M Frank d irfgl eputy Director j;.,f ;
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Enclosure:
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