plenum

English translation: an enclosure or space completely filled with water

GLOSSARY ENTRY (DERIVED FROM QUESTION BELOW)

English term or phrase:	plenum
Selected answer:	an enclosure or space completely filled with water
Entered by:	Masoud Kakouli Varnousfaderani

06:48 Jul 13, 2016

English language (monolingual) [PRO]
Nuclear Eng/Sci / Cooling systems

English term or phrase: plenum

Until early September 2011, cooling was controlled by adjusting the amount of circulation water injected via the feedwater line through the downcomer and lower plenum into the core region.

Masoud Kakouli Varnousfaderani KudoZ activity Questions: 561 (1 open) (1 without valid answers) (72 closed without grading) Answers: 103 Türkiye
Local time: 11:31

an enclosure or space completely filled with water

Explanation:
Plenum is a space completely filled with matter, i.e. water, in this case. The downcomer is a pipe that connects a cistern to a WC, wash basin, etc., also called a downcome.

Therefore, water was fed by passing through the downcome and the lower plenum in order to reach the core region.

http://www.thefreedictionary.com/plenum
http://www.thefreedictionary.com/Downcomer

Selected response from:

Yasutomo Kanazawa
Japan
Local time: 17:31

Grading comment

4 KudoZ points were awarded for this answer

SUMMARY OF ALL EXPLANATIONS PROVIDED

3 +3

an enclosure or space completely filled with water

Yasutomo Kanazawa

Summary of reference entries provided

plenum

Armorel Young

More references

Taña Dalglish

Answers

1 hr confidence:

peer agreement (net): +3

an enclosure or space completely filled with water

Yasutomo Kanazawa
Japan
Local time: 17:31
Native speaker of:

Japanese
PRO pts in category: 40

Reference comments

2 hrs peer agreement (net): +2

Reference: plenum

Reference information:
Put simply:

A plenum chamber is a pressurised housing containing a gas or fluid (typically air) at positive pressure (pressure higher than surroundings). One function of the plenum is to equalise pressure for more even distribution, because of irregular supply or demand. A plenum chamber can also work as an acoustic silencer device.
https://en.wikipedia.org/wiki/Plenum_chamber

Or in more complicated terms:
Pellets meeting QA specifications are loaded into tubes made from an appropriate zirconium alloy, referred to as the ‘cladding’. The filled tube is flushed with helium and pressurized with tens of atmospheres (several MPa) of this gas before the ends are sealed at each end by precision welding. A free space is left between the top of the pellet stack and the welded end-plugs – this is called the ‘plenum’ space and it accommodates thermal expansion of the pellets and some fission product gases. A spring is usually put into the plenum to apply a compressive force on the pellet stack and prevent its movement.
http://www.world-nuclear.org/information-library/nuclear-fue...

Armorel Young
Native speaker of: English

6 hrs

Reference: More references

Reference information:
http://www-pub.iaea.org/MTCD/Publications/PDF/AdditionalVolu...
Page 180 is where your text is (re plenum).

Masoud: I have provided many links to technical volumes re Fukushima, and enclose additional information for your reading, assuming you are currently translating the entire Volume 1 of the IAEA report (and possibly, the other 4 volumes of the massive report, which I later mention). I think it is worth going through some of these, at least, for background information which I am sure will clarify a lot of your doubts and questions you continue to raise. There is a vast amount of information available on Fukushima, and I am sure you can research a lot of this yourself. Pictures certainly help to identify areas and they are so many which are too numerous to mention.

https://bravenewclimate.com/2011/04/23/fukushima-open-thread... (there are pictures too and other links to various documents, some of which I have extracted). There are comments, and many contain additional links.

http://www.tepco.co.jp/en/press/corp-com/release/betu11_e/im... (roadmap towards Restoration)

http://nuclearpoweryesplease.org/blog/2011/04/22/day-42-how-...

***One post here makes reference to the plenum/downcomer:
@Mike Keefer:
The jet pump inlets are in the downcomer, about 2/3 of the
way down the fuel I think. (should read 1/3 of the way down) But the jet pumps draw water from the downcomer, inside the RPV and outside the plenum. They push some of the feedwater first back up, and then drive it down to below the bottom of the core where it makes a 180 degree turn and comes back up through the core. in normal operation. So the jet pump circuit is internal to the
RPV.

The recirc pump inlets are a bit higher than the jet pump
inlets; above the top of the fuel, I think, but I’m not
completely sure. The main feedwater inlets and steam outlets
are way up at the top of the RPV, far above the core.

There are nice diagrams on Will Davis site explaining and
diagramming this if you look back through his old posts
since Fukushima hit the news.***

Fukushima (by Will Davis) - there are loads of information here (over 10 pages)
http://atomicpowerreview.blogspot.com/#uds-search-results
atomic power review: Five Years From Fukushima: Where Are We ...
Mar 10, 2016 ... It is not any stretch to say that the conditions at Fukushima Daiichi are very considerably improved, and of course one asks "how could they not ...

atomic power review: Fukushima Daiichi Accident Reports
There are a number of reports on the Fukushima Daiichi accident which have been prepared by either industrial or regulatory bodies.
atomicpowerreview.blogspot.com

atomic power review: IAEA Director's Report on the Fukushima ...
Sep 1, 2015 ... The International Atomic Energy Agency (IAEA) has just released an absolutely massive report on the Fukushima Daiichi accident. While there ...
atomicpowerreview.blogspot.com

atomic power review: Fukushima Daiichi: Reactor buildings
Sep 14, 2011 ... Two types of brief updates on the reactor buildings at Fukushima Daiichi. First, the steel framework has been completed for the "first type" or ...
atomicpowerreview.blogspot.com
More than 10 pages > see 1 2 3 4 5 6 7 8 9 10

http://atomicpowerreview.blogspot.com/2015/09/iaea-directors...
IAEA Director's Report on the Fukushima Daiichi Accident - September 1, 2015
The International Atomic Energy Agency (IAEA) has just released an absolutely massive report on the Fukushima Daiichi accident. While there are literally dozens and dozens of previous reports that any researcher can consult (check the stand alone page on this blog for a good list of these) this report appears to attempt to be definitive. There are thousands of pages of report and annex to go through; I've downloaded the report (which has to be done somewhat laboriously through multiple links) and will report back here on this blog should I find anything especially surprising.

CLICK HERE TO ACCESS THE IAEA PAGE FOR THIS NEW REPORT. https://www.iaea.org/newscenter/news/iaea-releases-director-... (I had already provided links to these 5 technical volumes under "entry/exit gates" question).

Regards.

Taña Dalglish
Jamaica
Native speaker of: English
PRO pts in category: 12

Login or register (free and only takes a few minutes) to participate in this question.

You will also have access to many other tools and opportunities designed for those who have language-related jobs (or are passionate about them). Participation is free and the site has a strict confidentiality policy.

Return to KudoZ list

KudoZ™ translation help

The KudoZ network provides a framework for translators and others to assist each other with translations or explanations of terms and short phrases.

See also:

ProZ.com term search

Search millions of term translations

plenum

English translation: an enclosure or space completely filled with water

Answers

Reference comments

KudoZ™ translation help

Your current localization setting

Select a language

plenum

English translation: an enclosure or space completely filled with water

Answers

Reference comments

KudoZ™ translation help

You have native languages that can be verified

Your current localization setting

Select a language