ML19332D510
| ML19332D510 | |
| Person / Time | |
|---|---|
| Site: | 07105450 |
| Issue date: | 11/28/1989 |
| From: | Macdonald C NRC OFFICE OF NUCLEAR MATERIAL SAFETY & SAFEGUARDS (NMSS) |
| To: | Reitler E WESTINGHOUSE ELECTRIC COMPANY, DIV OF CBS CORP. |
| References | |
| NUDOCS 8912040068 | |
| Download: ML19332D510 (2) | |
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NRC PDR CEMacDonald RChappell
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IWestinghouseElectric-Corporation GGardes ATTN: t - Mr.- E. K.- Reitler L CLindner Ns
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,a Gentlemen:
SGTB r/f This refers to your: application dated October 5,1989, requesting an amendment to Certificate'of Compliance No. 5450 for the Model No. RCC package, f
In connection with our review, we need the information identified in the p
. enclosure.tolthis letter.-
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Please advise us within 30 days.from'the date of this letter when this informa.
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' tion will be provided. - Additional"information requested by> this letter should
.be submitted in'the form of-revised pages.. If,you have any questions:regarding this matter, we would be pleased to meet with_ you and your staff.,,
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' Sin er ly..
Charles E..MacDonaldi Chief
~ Transportation Branch-Division of Safeguards and Transportation,, NMSS
Enclosure:
As stated sr.
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DATE:11/3t/89
- 11/L1/89:11/7.8/89
- 11/$ /89 OFFICIAL RECORD COPY j
I'L 1 1; ] Encl. to Ltr. dtd. KOY 2 8 me - What is the minimum' mass loading of ZrB per unit length within a IFBA rod 1. and what tests, ocasurer..cnts and prccaukions are used to escure that the i minimum mass loading is present? 2. Discuss the extent to which the distribution of the ZrB e ating on the 2 fuel pellets can vary and the effect the variability of the coating has on sub-criticality.. 3. Describe the tests, measurements and precautions taken to assure that the pellets with the ZrB,3 coating are in the correct position and are the correct length in the IFBA rods. 4.- Describe the tests, measurements and precautions taken to assure that the IFBA rods are in the correct positions in the fuel assehblies. 5. Show that the effectiveness of the ZrB,, coating will not be significantly reduced under the hypothetical accident conditions in 10 CFR Part 71. coating on the 6. Justify the credit, not to exceed 75%, taken for the ZrB2 feel pellets in the IFBA rods. 7. Describe and justify the model used to represent the ZrB in the criticality 2 analyses. 1' Y y N* %-*p- _}}