penetrate

English translation: enter

GLOSSARY ENTRY (DERIVED FROM QUESTION BELOW)
English term or phrase:penetrate
Selected answer:enter
Entered by: Masoud Kakouli Varnousfaderani

15:29 Aug 11, 2016
English language (monolingual) [PRO]
Science - Nuclear Eng/Sci
English term or phrase: penetrate
The IC isolation logic is similar to the logic for other piping systems which are not required for postulated accident mitigation and which penetrate the primary containment and are also connected to the reactor pressure vessel, such as the main steam lines and their associated main steam isolation valves (MSIVs).



Primary containment is the main vessel of reactor, the reactor pressure vessel which is home to reactor core is located inside the primary containment vessel.
Masoud Kakouli Varnousfaderani
Türkiye
Local time: 10:40
enter
Explanation:
The idea is that by the pipes entering the containment vessel, they have to 'penetrate' the protective barrier, thus creating a potential weak / vulnerable point.
Selected response from:

Tony M
France
Local time: 08:40
Grading comment
4 KudoZ points were awarded for this answer



SUMMARY OF ALL EXPLANATIONS PROVIDED
4 +5enter
Tony M
4 +1pass through
Terry Richards
Summary of reference entries provided
AIEA
Didier Fourcot

Discussion entries: 4





  

Answers


24 mins   confidence: Answerer confidence 4/5Answerer confidence 4/5 peer agreement (net): +5
enter


Explanation:
The idea is that by the pipes entering the containment vessel, they have to 'penetrate' the protective barrier, thus creating a potential weak / vulnerable point.

Tony M
France
Local time: 08:40
Native speaker of: Native in EnglishEnglish
PRO pts in category: 36

Peer comments on this answer (and responses from the answerer)
agree  Yasutomo Kanazawa
42 mins
  -> Thanks, Yasutomo-san!

agree  Didier Fourcot: The devices that seal them at the wall are most often called "penetrations" and "to penetrate" is used by regulatory agencies: http://www.nrc.gov/reading-rm/doc-collections/cfr/part050/pa...
2 hrs
  -> Thanks, Didier! Exactly!

agree  Jörgen Slet
1 day 47 mins
  -> Thanks, Jörgen!

agree  Phong Le
1 day 8 hrs
  -> Thanks Phong Le!

agree  acetran
2 days 16 hrs
  -> Thanks, Ace!
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57 mins   confidence: Answerer confidence 4/5Answerer confidence 4/5 peer agreement (net): +1
pass through


Explanation:
This is basically the same as Tony's answer except that it stresses the fact that they not only enter the containment but they also come out the other side. As Tony says, this creates a potential weak spot.

Terry Richards
France
Local time: 08:40
Native speaker of: Native in EnglishEnglish
PRO pts in category: 16

Peer comments on this answer (and responses from the answerer)
agree  Jörgen Slet
1 day 15 mins
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Reference comments


2 hrs
Reference: AIEA

Reference information:
"penetration" is the term (defined in doc mentioned in comment above), same in French "pénétration", AIEA reference (ie required vocabulary):
http://www-pub.iaea.org/MTCD/publications/PDF/Pub1189_web.pd...


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Note added at 16 heures (2016-08-12 07:55:25 GMT)
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Sorry this was an example of use, the definition is in the other doc for type B tests:
http://www.nrc.gov/reading-rm/doc-collections/cfr/part050/pa...
for the following primary reactor containment penetrations:
1. Containment penetrations whose design incorporates resilient seals, gaskets, or sealant compounds, piping penetrations fitted with expansion bellows, and electrical penetrations fitted with flexible metal seal assemblies.
2. Air lock door seals, including door operating mechanism penetrations which are part of the containment pressure boundary.
3. Doors with resilient seals or gaskets except for seal-welded doors.
4. Components other than those listed in II.G.1, II.G.2, or II.G.3 which must meet the acceptance criteria in III.B.3.


Didier Fourcot
Works in field
Native speaker of: Native in FrenchFrench
PRO pts in category: 24
Note to reference poster
Asker: Thanks for adding this! I downloaded this document but could not find where "penetration" is defined.

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