PowerSwitch Main Page
PowerSwitch
The UK's Peak Oil Discussion Forum & Community
 
 FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   RegisterRegister 
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 

Missing power

 
Post new topic   Reply to topic    PowerSwitch Forum Index -> Nuclear Power
View previous topic :: View next topic  
Author Message
woodburner



Joined: 06 Apr 2009
Posts: 4127

PostPosted: Sun Jan 15, 2017 1:28 pm    Post subject: Missing power Reply with quote

Something has happened with nuclear, there is about 1.5GW missing compared with a few weeks ago.

http://gridwatch.templar.co.uk/index.php
_________________
To become an extremist, hang around with people you agree with. Cass Sunstein
Back to top
View user's profile Send private message
adam2
Site Admin


Joined: 02 Jul 2007
Posts: 8096
Location: North Somerset

PostPosted: Sun Jan 15, 2017 2:21 pm    Post subject: Reply with quote

The present output is fairly average, a few weeks ago was unusually good.

Various outages at present, one reactor shut down for repairs to steam turbine overspeed protection, another planned outage extended for boiler tube leaks, and one shut down due to defective boiler feed pump.

One reactor reducing load prior to statutory shutdown for inspection of the core and another running at about one third capacity due to refueling.

Between 6 and 7GW is a fairly typical winter output, much more than that is a most useful bonus but should not be counted on.
_________________
"Installers and owners of emergency diesels must assume that they will have to run for a week or more"
Back to top
View user's profile Send private message
mikepepler
Site Admin


Joined: 24 Nov 2005
Posts: 3086
Location: Rye, UK

PostPosted: Mon Jan 16, 2017 10:24 am    Post subject: Reply with quote

Details here:
https://www.edfenergy.com/energy/power-station/daily-statuses
_________________
Mike

"Deal with reality or reality will deal with you"
Dr Colin Campbell

http://peplers.blogspot.com
http://peakoilupdate.blogspot.com
Back to top
View user's profile Send private message Visit poster's website
adam2
Site Admin


Joined: 02 Jul 2007
Posts: 8096
Location: North Somerset

PostPosted: Sat Nov 04, 2017 10:24 am    Post subject: Reply with quote

UK nuclear output is down to about 6.5GW at present.

Three reactors are shut down on a planned basis for statutory inspections and should return to service before the peak demand season.
Two reactors are operating at significantly reduced load for refuelling, and again should return to full load operation before peak demand season.

Of slightly greater concern is the position at Heysham 1.
One reactor has been operating on 7 boilers out of 8 for a couple of years due to a fault.
I now observe that the other reactor is at significantly reduced load due to a boiler tube leak.
Makes one wonder if boiler leaks are going to be a regularly recurring cause of shutdowns or reduced output.
_________________
"Installers and owners of emergency diesels must assume that they will have to run for a week or more"
Back to top
View user's profile Send private message
RenewableCandy



Joined: 12 Sep 2007
Posts: 12669
Location: York

PostPosted: Sat Dec 09, 2017 7:27 pm    Post subject: Reply with quote

It's below 6 GW now.

Not a good time to take stuff offline.
_________________
Soyez réaliste. Demandez l'impossible.
Stories
The Price of Time
Back to top
View user's profile Send private message
adam2
Site Admin


Joined: 02 Jul 2007
Posts: 8096
Location: North Somerset

PostPosted: Sat Dec 09, 2017 8:41 pm    Post subject: Reply with quote

Indeed, we can cope with nuclear output reduced to below 6GW, provided that everything else works OK, with good coal and CCGT availability we should be OK.
But a spate of coal or gas outages during calm weather could be interesting, in windy weather all would be fine due to 6GW or more from wind.
I don't think that we can count on imports from France as they are a bit short.
_________________
"Installers and owners of emergency diesels must assume that they will have to run for a week or more"
Back to top
View user's profile Send private message
adam2
Site Admin


Joined: 02 Jul 2007
Posts: 8096
Location: North Somerset

PostPosted: Sat Dec 09, 2017 8:47 pm    Post subject: Reply with quote

I think that something has broken !
A few minutes ago, nuclear output was only just below 6GW, but now it is down to 5.5GW.

That suggests that we lost one reactor earlier today, and another one in the last few minutes.

Although the status of our nuclear reactors may be viewed on line, link a few posts back, this is NOT real time so wont reveal what has broken until tomorrow.
_________________
"Installers and owners of emergency diesels must assume that they will have to run for a week or more"
Back to top
View user's profile Send private message
adam2
Site Admin


Joined: 02 Jul 2007
Posts: 8096
Location: North Somerset

PostPosted: Thu Mar 08, 2018 7:41 pm    Post subject: Reply with quote

adam2 wrote:
UK nuclear output is down to about 6.5GW at present.

Of slightly greater concern is the position at Heysham 1.
One reactor has been operating on 7 boilers out of 8 for a couple of years due to a fault.
I now observe that the other reactor is at significantly reduced load due to a boiler tube leak.
Makes one wonder if boiler leaks are going to be a regularly recurring cause of shutdowns or reduced output.


Update re above at Heysham 1.
Reactor 1 remains at reduced load on 7 boilers out of 8
Reactor 2 that was at part load due to boiler leaks, was shut down to address the leaks, has been restarted, but is now at significantly reduced load, on 6 boilers out of 8.
_________________
"Installers and owners of emergency diesels must assume that they will have to run for a week or more"
Back to top
View user's profile Send private message
adam2
Site Admin


Joined: 02 Jul 2007
Posts: 8096
Location: North Somerset

PostPosted: Fri Mar 01, 2019 4:10 pm    Post subject: Reply with quote

This winter has not been a good winter WRT to UK nuclear power.
For most of the winter output has been around 6 to 6.5 Gw, a significant drop from the 7.5 Gw routinely achieved in previous years.

Due to a mixture of planned outages and breakdowns.
_________________
"Installers and owners of emergency diesels must assume that they will have to run for a week or more"
Back to top
View user's profile Send private message
adam2
Site Admin


Joined: 02 Jul 2007
Posts: 8096
Location: North Somerset

PostPosted: Wed Jun 12, 2019 4:36 pm    Post subject: Reply with quote

Not doing very well at the moment.
Nuclear output down to below 4GW, the lowest that I recall ever seeing.

I think that something broke or tripped at about 13-30 today. Whilst output figures for each nuclear station are available, these are NOT real time and do not show anything that happened after the last update.
_________________
"Installers and owners of emergency diesels must assume that they will have to run for a week or more"
Back to top
View user's profile Send private message
adam2
Site Admin


Joined: 02 Jul 2007
Posts: 8096
Location: North Somerset

PostPosted: Wed Aug 19, 2020 1:09 pm    Post subject: Reply with quote

Nuclear output is down to about 3.5 GW, about the lowest that I recall.

One reactor shut down at request of national grid, and another at part load for the same reason.
Several planned outages for repairs and inspections, some of which may be prolonged.
Both reactors at Heysham 1 are out of use. one for refueling and repair of boiler leaks (again) and the other has tripped due to loss of condenser vacuum.
_________________
"Installers and owners of emergency diesels must assume that they will have to run for a week or more"
Back to top
View user's profile Send private message
Mark



Joined: 13 Dec 2007
Posts: 1353
Location: NW England

PostPosted: Fri Aug 21, 2020 1:39 pm    Post subject: Reply with quote

Powering Britain:
https://www.bbc.co.uk/programmes/m000lyff

Anybody see this BBC programme last night about Heysham ?
Or was it only available in the NW ?
Back to top
View user's profile Send private message
adam2
Site Admin


Joined: 02 Jul 2007
Posts: 8096
Location: North Somerset

PostPosted: Sat Aug 22, 2020 6:16 pm    Post subject: Reply with quote

I think that the TV programme was only broadcast in the NW.

Nuclear output now down to only 2.7Gw, unprecedented AFAIK.
should hopefully improve significantly before winter.
_________________
"Installers and owners of emergency diesels must assume that they will have to run for a week or more"
Back to top
View user's profile Send private message
PS_RalphW



Joined: 24 Nov 2005
Posts: 5792
Location: Cambridge

PostPosted: Sat Oct 03, 2020 6:47 am    Post subject: Reply with quote

Right now nuclear is the biggest single source of power in the UK. A smidge over 6GW. Both wind and gas a smidge under. I don't expect that has happened very often.
Back to top
View user's profile Send private message
adam2
Site Admin


Joined: 02 Jul 2007
Posts: 8096
Location: North Somerset

PostPosted: Sat Oct 03, 2020 2:11 pm    Post subject: Reply with quote

Very rare in daytime hours, but fairly regularly achieved overnight.

The large scale use of wind and solar power actually increases the chances of nuclear being the largest source, perhaps counter intuitively, but consider the following illustrative examples.

1) Nuclear=6 CCGT=14 Wind, solar, hydro, imports, and coal 8 in total, but each one less than 6. Nuclear clearly not the largest.

2) Nuclear=6 CCGT=5 wind=5 PV=4 coal, biomass, hydro, and imports 8 in total, but each one less than 6. Nuclear is clearly now the largest, despite actual nuclear production being unaltered at 6, and total demand also being similar.
All figures in GW.
_________________
"Installers and owners of emergency diesels must assume that they will have to run for a week or more"
Back to top
View user's profile Send private message
Display posts from previous:   
Post new topic   Reply to topic    PowerSwitch Forum Index -> Nuclear Power All times are GMT + 1 Hour
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum


Powered by phpBB © 2001, 2005 phpBB Group