ML20134D345
| ML20134D345 | |
| Person / Time | |
|---|---|
| Issue date: | 12/05/1983 |
| From: | Maura F NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| To: | Arndt E NRC OFFICE OF NUCLEAR REGULATORY RESEARCH (RES) |
| Shared Package | |
| ML20134D314 | List: |
| References | |
| FOIA-84-51 NUDOCS 8508190190 | |
| Download: ML20134D345 (3) | |
Text
'
u 2
December 5, 1983
, c, 0W
,oN M
MEMORANDUM FOR:
E. Cunter Arndt, MSEB, DET, RES FROM:
F. Maura, Rx Inspector, ReE on III t
SUBJECT:
YOUR REQUEST FOR THE REVIEW OF REYTBLATT'S VERSION OF ANSI /ANS 56.8-1981 (n 0"a:ETARY)
I have co=pleted the requested review and in general I do not find much to be Emined by the purchase of Mr. Reytblatt's version of ANSI /ANS 56.8-1981. While some paragraphs are an icprovement over the present standards, others I find confusing or as weak as the standard. Because of time limitations I was not
,able to dedicate the effort necessary to reach a conclusion on whether Mr. Reytblatt's method of calculating the containment leakage rate is any better j
than the ANSI $6.8 cethod. In any case that is an area where it may be g-r 84 desirable to run soce actual cases to show whether it makes a significant g 4 3,4 //, i difference or not.
Regarding Type B and C testing I was surprised to see no c y g g T' improvecent over the present standard since I have always considered this area a T yo#
to be the weakest part of the standard, the one most abused by If eensees, and the least inspected by the NRC.
/4Df eI 4 The following are some specific comments r*Earding Mr. Reytblatt's documents:
m o.cS[
E604 Faragraph 3.2.I'.4 System Venting and Draining - Has the same problems as the 7
present standard. Both fail to describe how the Type C
- T Y' test results are added to the Type A test resnits. To what confidence level, if any, are the results added?
(Type A results are given to the 90% coniidenet level, individual Type C results with the instrument system error only.)
Paragraph 3.2.1.7 Type A Test Environment - It is not clear to i e whether it applies to the tecperature inside or outside containment.
Why 80*F7 Paragraph 3.2.4.1 Type A Test Frequency - Foor working. I assume he wants l
the same as ANSI $6.8.
l 1
8508190190 850802 PDR FOIA GOGOL84-51 PDR l
l-'
1.
L
des
- ] h ujM re
'j pheh" E. Cunter Armdt 2
Paragraph 4 Instrumentation - I prefer his version of 4.1.1.4 than the present standard, however, ParaEraph 4.1.1.5 for flovmeters should be worded in terms of La to ensure that r' solution e
and repeatability are as good as the required instrument accuracy and sensitivity. They are not in his version.
Should be used if free.
Paragraph 5.1.1.3 Pressure Sensors - Eaving two pressure sensors at different elevations may be of academic interest, however, what happens when the two pressure readings are different (within or outside the accuracy of the sensors)? The standard does not state whether they are to be averaged, weight averaged, or what? Ve already get different readings when both sensors are on the sa e instrument tap. And so what, as long as the changes are constant, within the instrument accuracy, sensitivity, and repeatability.
. Paragraph 5.2.1 Eardware Calibration - Better than ANSI $6.8, however, not as good as our proposal to you dated AuEust 6, 1982.
Paragraph 5.2.2 Software Calibration - Confusing, I ac not sure what is to be done since containment can not be isolated from the environment.
Paragraph 5.2.2.1 It is not clear to me how this vill detereine if the weight factors are correct.
It appears that depending where one injects or bleeds u.ay influence one or two sensors but not necessarily the rest.
~I Paragraph 5.3.2 Depressurization - I see not auch benefit for the effort required.
l Paragraph 5.3.4 Temperature Control - 1 like the idea of having no fans operating during the test.
If the weighting factors have been correctly determined, nixing is not really needed.
l Operating fans have always bothered ce because I have no way of determining their effect on the res,ults. His
>l suSEestion should be used if free.
Section 6 Test Frocedures for Type B and C Tests - Very sin.ilar to the present standard to the point that it even allows the
,l use of the " air discharge from the test volume" flovrate method which 1 strongly oppose.
j Both versions are also silent on equalization time and test l
duration for the ranee of voluces tested (from very small volumes ofestone cuft to airlocks of hundreds of cuit).
I'
,l l
t
A
'r av Ara y,s - -
s-jykA/4e!N E. Cunter Arndt 3
I apoloEize for mot giving you my coments sooner. Enclosed I as returning to you the material you sent for my review. No copies were made of any of the caterial.
Original siEned by F. A. Maura 4
F. A. Maura Rx Inspector ec:
L. Reyes 1
l l
i i
I t
l l
e L
l i
i i
RIII i
i ura/sv 12/05/83 i