ML19340A986
| ML19340A986 | |
| Person / Time | |
|---|---|
| Site: | Dresden  |
| Issue date: | 10/11/1968 |
| From: | Joyner J US ATOMIC ENERGY COMMISSION (AEC) |
| To: | US ATOMIC ENERGY COMMISSION (AEC) |
| Shared Package | |
| ML19340A984 | List: |
| References | |
| NUDOCS 8009240799 | |
| Download: ML19340A986 (2) | |
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7 UNITED STATES
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ATOMIC ENERGY COMMISSION District II Safeguards Office Oak Ridge, Tennessee 37830 IN REPLY REFER TO:
October 11, 1968 To the Files
SUMMARY
OF FINDINGS - COMMONWEALTH EDISON COMPANY, DRESDEN UNIT NO.1 The following su=arizes the findings resulting from the nuclear materials safeguarh inspection conducted by Messrs. James H. Joyner and John W. Hodges during the week of September 16, 1968, at Unit No.1, Dresden Power Station, Co=monwealth Edison Company.
The findings were discussed with Reactor Engineers Bob Icmke and Larry Thompson on September 19, 1968, in the absence of Plant Superintendent, H. K. Hoyt, and with Don Ieydon, who prepares the material status reports, on September 20, 1968. A copy of the su ry was left for Mr. Hoyt.
1.
Written material control and accounting procedures meet the current requirements of 10 CFR 70 51(b). We understand that the performance (thermal output) calculation writeup is being revised and that United Nuclear will furnish the site with a copy of information describing their ISOLUX-TRILUZ procedure (burnup calculation). A copy of this description was available at the Cc=monwealth Edison main office in Chicago and was reviewed by the inspection team.
2.
Documentation of internal and external fuel movements was found to be acceptable.
Dresden was tdvised to maintain a more complete record of annual inventories.
3 It was suggested that a basin schematic be used and that a certification statement be included on the schematic. Serial numbers of material in the fuel vault might be listed on the same schematic to cut down on paper volu=e.
It was noted that B00-5 wei hts shown in the computer printout for type V 4
assemblies (new at the time) do not agree with weights shown on the 388's.
No explanation could be found. The differences are consistently 18 gra=s 235U per assembly (total of 19 kgs. for the core). Total uranium values were found to be correct indicating that 2380 values shown in the BOC-5 235U weights printcut are in error by 18 grams in the opposite direction.
shown in the printout are lower than the co= parable value on the 388. The net effect is that Co=onwealth Edison has paid for almost two kilograms of
- -- 435U burnup that'did not occur. Don Ieydon, Comonwealth Edison General r
Books Department, wi:.1 attempt to track down and correct this as necessary.
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To the Files October 11, 1968 5
Errors were noted in the June 1968 performance calculatior.. Primary feedwater pressure and primary and secondary feedwater terperatures were
-~1 incorrectly averaged, resulting in an overstatement of thermal output by i
180 MWD. The adjustment to thermal power output will be included in the burnup calculations for the July 1 to December 31, 1968, period. Commonwealth i
Edison was advised that special material status reports would not be required.
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