ML20207K120
| ML20207K120 | |
| Person / Time | |
|---|---|
| Site: | Fort Calhoun  |
| Issue date: | 12/22/1986 |
| From: | Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML20207K117 | List: |
| References | |
| TAC-63144, NUDOCS 8701090295 | |
| Download: ML20207K120 (1) | |
Text
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NUCLEAR REGULATORY COMMISSION
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WASHINGTON, D. C. 20555 SAFETY EVALUATION BY THE OFFICE OF NUCLEAR REACTOR REGULATION OMAHA PUBLIC POWER DISTRICT FORT CALHOUN STATION, UNIT NO. 1 DOCKET NO. 50-285 CONTROL ROOM CARPET I.
INTRODUCTION Section D.1(d) of BTP APCSB 9.5-1 stipulates that the interior finish of walls and floor / ceiling assemblies should be noncombustible or listed by a nationally recognized testing laboratory for flame spread, smoke and fuel contribution of 25 or less, as determined by the ASTM E-84 fire test method.
By letter dated October 10, 1986, the licensee provided information relating to the combustibility of carpeting installed in the control room.
This information was in the form of test results of the carpet when subjected to the fire test method stipulated in ASTM E-648, and, as such, represents a deviation from the staff's fire protection guidelines.
II.
EVALUATION The two test methods identified above measure distinctly different fire hazards parameters and cannot be d rectly compared.
However, as sanctioned by National Fire Protection Association Standard No. 101, carpeting with a flame spread rating of 25 or less as determined by ASTM E-84 can be considered as a Class I interior finish.
Similarly, carpeting with a critical radiant flux of 0.45 watts per square centimeter, as determined by ASTM E-648, also qualifies as Class I.
The test results submitted by the licensee certify that the carpeting used in the control room is Class I.
Therefore, in the staff's judgement, this carpeting is equivalent.to that which would conform with the criteria of Section D.1(d) of Appendix A to BTP APCSB 9.5-1.
III. CONCLUSION Based on its evaluation, the staff concludes that the carpeting installed in the control room is acceptable from the standpoint of fire resistance.
Dated: December 22, 1986 Principal contributor:
D. Kubicki g
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