ML19329C288
| ML19329C288 | |
| Person / Time | |
|---|---|
| Site: | Davis Besse  |
| Issue date: | 03/29/1977 |
| From: | Jordan E NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| To: | Seyfrit K NRC OFFICE OF INSPECTION & ENFORCEMENT (IE) |
| Shared Package | |
| ML19329C284 | List: |
| References | |
| NUDOCS 8002120997 | |
| Download: ML19329C288 (2) | |
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es mac UNITED STATES
[*g NUCLEAR REGULATORY COMMISSION
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799 ROOSEVELT ROAO V
6 GLEN ELLYN, ILLINots 60137 l
'% ***** $g March 29, 1977 Docket No. 50-346 MDf0RANDUM FOR:
K. V. Seyfrit, Chief, Reactor Technical Assistance anch, IE:HQ THRU:
F. Heishman, Chief, Reactor Construction and Engineering Support Branch, RIII FROM:
E. L. Jordan, Chief, Engineering Support Section, RIII
SUBJECT:
FIRE BARRIER TEST DISCREPANCIES (A/I F30277Hl)
TOLEDO EDISON COMPANY - DAVIS-BESSE j Several discrepancies were identified during an inspection conducted at Davis-Besse March 23-25, 1977 relating to tests of fire barriers.
These tests provide the basis for fire barrier installations at the Davis-Besse facility. The details of the discrepancies which were identified by the RIII Electrical Inspector, Mr. F. Jablonski, are provided in the enclosure.
In summary, it was determined that fire resistance tests did not fully comply with ASTM E-119'-73 requirements since:
1.
No floor test of a penetration was performed.
2.
Wall test penetrations were filled with silic;ne foam with the penetration held vertical, not as done in the._ field.
3.
Test specimens were not truly representative of actual construction in either cable configuration or tray installation in the wall openings.
4.
Test penetrations were faced with a fire resistant daming =aterial which is not in use at Davis-Besse.
5.
Flexible ceramic fibers which are in use in certain installations at Davis-Besse were not tested.
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K. V. Seyfrit March 29, 1977 Similarly, the hose stream test did not fully comply with ASTM E-119-73 requirements since the tested cable tray installation was not truly representative of the actual construction either in cable configuration or tray installation.
6 It is the licensee's position that based upon NELPIA's acceptance of the silicone foam penetration seals, no further action is required.
It is RIII concern that TECo letter of November 3, 1975 to NRR which stated tests were conducted to ASIM E-119 gave nore credit to tests than is warranted based upon the identified discrepancies.
With respect to Davis-Besse, RIII is of the opinion that resolution of the discrepancies need not delay licensing providing a commitment is obtained to perform "truly representative" fire barrier tests "under the most adverse design conditions".
RIII requests a position regarding adequacy of the fire stops as installed at Davis-Besse.
As a possible generic concern, RIII understands that the subject fire barrier tests were also used as the basis for fire barrier installations at Hatch and D. C. Cook facilities.
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E.
ordan, Chief Eng eering Support Section
Enclosure:
Fire Barrier Test Discrepancies cc w/ encl.:
R. F. Warnick, Regional Coordinator T. N. Tambling, RIII
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