ML20127N019

Discusses Amplifying Recommendations for Review of Vessel Dimensional & Matls Data by Design Analyst as Indicated in Paragraph Three of Licensee 670117 Twx

ML20127N019
Person / Time
Site:	Monticello
Issue date:	01/19/1967
From:	Lofy R PARAMETER, INC.
To:	James Shea US ATOMIC ENERGY COMMISSION (AEC)
References
NUDOCS 9211300540
Download: ML20127N019 (3)

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ATOMIC ENERGY COMMSSION GERMANTOWN MARYL AND 1-19-67 f

l RELAY TO REGULATOFY DIVISION AT BETHESDA i

ATTN MP J J SHEA DIVISION OF-REACTOR LICENSING THIS MEMO IS TO AMPLIFY ON OUR RECOMMENDATION FOR REVIEW O ii.l' VESSEL DIMENSIONAL AND-MATERI ALS DATA BY THE DESIGN ANALYS INDICATED IN PARA 3 0F OUR l-17-67. TWX.

.q IT IS ASSUMED THAT THE FABRICATORS-INTENT IS T0 REPORT h

DIMENSIONAL DEVIATIONS' SUCH AS OFFSETS' OVALITY AND DEPARTU Q

FROM TRUE CIRCULAR FORM' AND OTHER FIT-UP PROBLEMS VHICH OC i;.

DURING CONSTRUCTION-0F THE VESSEL AND ARE'BEYOND CODE LIMITS FOR DISPOSITION AXX BY THE DESIGN ~ ANALYST.. THIS REPORTING-

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VOULD EXPECTED TO COME FROM THE QUALITY CONTROL ORGANIZATION.

HOWEVER' BECAUSE THE EFFEDT 0F DIMENSIONAL DEVI ATIONS ON STRESS INTENSITIES' PARTICULARLY IN COMPLEX AREAS -SUCH AS N0ZZLES AND REINFORCEMENT,S'-IS NOT ALSXXX ALWAYS-EVIDENT' 1

WE FEEL THAT THE DECISION TO REPORT THESE CONDITIONS SHOULD NOT BE LEFT ENTIRELY TO THE FIELD PERSONNEL.

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TECHNICAL EVALUATION BY THE DESIGNER MIGHT-BE NECESSARY h

il MERELY TO DETERMINE IF A PROBLEM REQUIRING ANALYSIS EXSISTS 4

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85 IS FOR<THESE REASONS THAT WE RECOMMEND THAT'ASXXX LY'

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' PROCEDURE ON MONTICELLO BECAUSE OF THE DIFFICULTY IN FE-SHA b

RESHAPING I.

43 RESHAPING OP RESIZING VESSEL COMPONENTS IN THE FIELD.

ADDITIONALLY' BECAUSE IN THE PAST FABRICATORS HAVE OFTEN REMIDIED ALLDIMENSINAL DEVI ATIONS EY PLENDING AND MIGHT HAVE LOST SIGHT OF FITUP REQUIREMENTS SPECIFIED BY THE CODE.

WHILE THESE REQUIREMENTS AEE NOW REASONAELE AND EXPLICIT 3

IN SECTION III FOR SEAMS OF MAIN SHELLS

• OTHER AREAS ARE NOT AS CLEARLY DEFINED.

THUS WE FEEL THE 100 PER CENT REPORTING PROCESS IS WARRANTED.

SIMILARLY THE DESIGH ANALYST WILL BE IN THE BEST POSITION TO EVALUATE THE EFFECTS OF MATERIALS DEFECTS ON VESSEL INTEGRITY.

CONSTRUCTION OF A SAFE VESSEL IS' IN A VAY ' STATISTICALLY DEPENDENT UPON THE PROSABILITY THAT LESS THAN PERFECT MATERIALS

• FABRICATION EFFECTS ' OPERATING STRESSES AND OTHER FACTORS WILL NOT COMBINE TO CAUSE A DANGEROUS CONDITION.

WE THINK THAT THE PARTICIPATION OF THE DESIGN ANALYST IN THE SELECTION AND APPLICATION OF SPECIFIC MATERIALS WHERIN DEFECTS ARE KNOWN TO EXIST

• IN THE SPECIFIC VESSEL.FAERICATION' WILL INCREASE THE ODDS AGAINST DANGEROUS CONDITIONS DEVELOPING ON A RANDOM EASIS.

R A LCFY PARAMETERMIL DE HQTS DID U GET THAT ALRIGHT WE EEAD U OK LEON RICKS RGR CUL LW t

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CONCURRENCE O DATE ANSWERED:

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BY CLASSIFIC ATION :

POST OFFICE FILE CODE:

h REG, NO. :

Ems 50463 (30PP. EI)

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DESCRIPTION: (Must Bt UNCLAS.3FisD)

REFERRED TO DATE RECEIVED By DATE T.A a:glifying their recommendations for review of vessel dimensional and matl4.

it_1._ts data by t,he design an g st as indicatel in 4

all artras pargraph 3 of their 1-17 67 t wx........

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