Newsgroup: it.discussioni.energie-alternative
Titolo: Olkiluoto 3 come non fare il nucleare

Un impianto troppo grosso (4300 MW termici) per una piccola nazione.
Riporto i testi completi delle notizie, perche' sembrano non piu'
reperibili, anzi e' stato proprio il blackout di notizie che mi ci ha
portato.
Roberto Deboni
Notizia dell'ultimo dell'anno (2008).
The Areva-Siemens consortium has filed a request for arbitration
concerning the delay and related costs for Olkiluoto-3, Finnish utility
Teollisuuden Voima Oy, or TVO, said in a December 31 statement. TVO said
the International Chamber of Commerce informed it December 30 of the
filing by the consortium, which is supplying the 1,600-MW EPR to RVO
under a fixed-price turnkey contract. TVO said the request is related to
a claim that the consortium had earlier presented to TVO. The utility
said it studied that claim and found it to be "without merit." TVO and
Areva have already been discussing compensation for the project's cost
overruns and delays. Areva officials have said TVO should absorb some of
the extra cost, but TVO management says the company will not do so. TVO
said in October that startup of the unit is about three years behind
schedule. The reactor was originally supposed to be online in May 2009,
but the project has been dogged by problems. The Areva-Siemens
consortium also has been involved in arbitration proceedings in the
Stockholm Chamber of Commerce arbitration court seeking to have TVO
share some of the cost overruns on the project. Analysts have
estimated the overruns at Eur 1.5 billion. The original contract amount
was Eur 3.2 billion.
I primi segnali di screzi, sono dell'Ottobre 2008
Teollisuuden Voima Oyj (TVO) has announced a further delay in the
completion of the third reactor at Olkiluoto, Finland, saying that the
unit may not be commissioned until 2012.
In a statement, the company said that "based on the present time
schedule information received from the plant supplier, Areva-Siemens,
the reactor plant civil construction works will take several months
longer than earlier expected." TVO added, "This additional time required
for the civil construction works will impact the time schedule of the
installation and erection works."
TVO noted, "The turn-key plant supplier is responsible for the time
schedule and for the acceleration measures required for keeping the
schedule. According to the schedule information submitted by the plant
supplier, TVO estimates that the start-up of the plant may be postponed
until 2012."
The work force on the construction site has doubled in 2008 to some
4000. The manufacture of several main components has now been completed.
The manufacture of the reactor pressure vessel head by Mitsubishi Heavy
industries (MHI) in Japan has been completed and it recently passed
pressure tests. The first steam generator has also been manufactured.
Meanwhile, the forging for the reactor cooling pipes has been validated.
Also, the turbine building is nearing completion, with all the main
components either on site or already in place. Civil construction works
at the reactor building continue. However, work on the nuclear island
has slowed markedly, primarily due to an apparent problem constructing
the reactor's unique double-containment structure.
TVO's Reijo Sundell told a group touring the Olkiluoto plant site today,
"We don't know the real reasons." The Finnish building regulations
regarding this have been known for a long time, he added, but said "the
consortium has no drawings, no plans of what to do for construction [of
the double containment]." He added that, "It is very important to get a
reliable and safe power plant. We can have a delay now - problems in
operation are more expensive." TVO shareholders, he said, will not make
a decision on building a fourth reactor at Olkiluoto until the third
unit is finished and making money.
TVO commented that "despite of the fact that a lot has been done,
additional delay postponing the start-up of the plant has occurred,"
adding that "the plant supplier is naturally responsible for the time
schedule and possible cost increase." It added, "TVO has a fixed-price
plant supply contract and the company is not in a process of agreeing
with the plant supplier upon sharing Areva's losses, contrary to the
information presented in the media."
Areva said in a statement that, "Confronted with construction delays,
the Areva-Siemens consortium succeeded in convincing TVO that a number
of measures were required to accelerate and improve the program. TVO
will be chiefly responsible for implementing these measures." The
company added, "The Areva-Siemens consortium will update the
construction schedule by the end of the year, depending on the progress
made."
Olkiluoto 3 is a 1600 MWe European Pressurized Water Reactor (EPR) and
will be the first Generation III+ nuclear power reactor in the world
when complete. Work began on the project in 2005, but various delays
have seen the startup date pushed back from the originally scheduled
2009 date. TVO announced in August 2007 that delays in construction had
likely pushed the completion date into 2011. In December 2007, the
company said that construction of the reactor would not be completed
until summer 2011.
As the first Evolutionary PWR (EPR) - a design produced by France's
Areva, which includes the former nuclear business of Germany's Siemens -
it has suffered from first-of-a-kind problems. The Areva-Siemens
consortium building the unit for a fixed price of €3 billion ($4.1
billion) has faced many challenges.
First to come to light were irregularities in foundation concrete, which
caused work to slow on site for months. Later it was found that
subcontractors had provided heavy forgings that were not up to project
standards and which had to be re-cast.

 portato.
C'e' anche qualche info non blackata:
http://www.areva-nc.com/scripts/areva-nc/publigen/content/templates/Show.asp?P=8304&L=EN
Siemens e' gia' al divorzio:
January 27, 2009
The CEO of Siemens informed the CEO of AREVA of his decision to exercise
the option to sell shares of AREVA NP's capital, 34% of which are held
by Siemens.

 portato.
L' impianto ha chiaramente sofferto i tipici problemi di un impianto di un
primo tipo, almeno che in aggiunta non ci sia qualcosa in più tra le due
aziende costruttrice e commissionatrice dell' impianto. Lo stesso identico
impianto costruito in Francia sta andando in maniera molto più spedita, con
ritardi e sovraccosti tutto sommato trascurabili
http://www.quotidianoenergia.it/n_ticker.php?id=29123


Evidentemente hanno imparato. La costruzione dell'impianto francese e'
partita dopo (Olkiluoto 3 Agosto 2005, Flamanville 3 Dicembre 2007).
Uno dei fattori che mi pare di capire ha infestato la costruzione
dell'impianto finlandese e' l'incarico della costruzione a manovalanza
non specializzata, ed oltretutto di svariate etnie, extracomunitari e
non. Il che crea anche problemi di linguaggio. Per esempio l'impresa
polacca ha continuato a saldare una delle principali strutture di
contenimento, nonostante l'ordine di fermare quelle operazioni, per
decidere verifiche e migliorie.
Non mi e' chiaro se e' colpa dei finlandesi di TVO (che magari hanno
pensato cosi' di risparmiare) oppure di Areva. Ma ho il sospetto che i
finlandesi abbiano le loro responsabilita'.
Probabilmente se ai francesi andra' meglio e' perche' userano una
squadra compatta, manovalanza esperta e specializzata.
Quando si tratta di costruzioni sofisticate e con severe norme da
rispettare, risparmiare su imprese e manodopera significa alla fine
spendere sempre di piu'.
In ogni caso, preferisco tanti piccoli reattori, tipo uno per ogni
citta', utilizzando il calore di scarto per il teleriscaldamento e
l'acqua calda, invece della soluzione delle mega-centrali.
Roberto Deboni

 l'acqua calda, invece della soluzione delle mega-centrali.
Ho sempre pensato che il nucleare non fosse granchè adatto ad applicazoni di
questo tipo (impianti di grandi dimensioni, solitamente localizzati molto
lontani dai centri di consumo), per quanto di per sè il nucleare sarebbe una
fonte perfetta per alimentare il riscaldamento civile - il prezzo del
riscaldamento risulterebbe praticamente solo il costo di impianto e di
manutenzione del teleriscaldamento; è invece interessante il fatto che un'
altra azienda finlandese, la Fortum, vuole costruire un altro impianto
nucleare della potenza di 1-1,8 GWe con lo scopo di fornire anche calore per
il teleriscaldamento
http://www.fortum.com/news_section_item.asp?path=14022;14024;14026;25730;551;46652
" Loviisa 3 will be designed to allow for combined heat and power
production. The location in the vicinity of the Helsinki metropolitan area
offers possibilities for extensive utilisation of district heat "

 ha scritto nel messaggio 
news:lrCdnQVto8lKuxbU...@giganews.com...
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E' forse ot, ma in generale, come tecnologia mi piace di più l' Ap-1000 
della westinghouse che sta per essere costruito in Cina, in quanto è un 
progetto più compatto e che si affida maggiormente ai caratterisitiche 
"passive" di sicurezza, come la gravità, la convezione naturale, ecc..questo 
riduce potenzialmente sia i tempi di costruzione che i costi rispetto all' 
Epr, che è una tenologia più "pesante" e complessa
http://www.china.org.cn/environment/pics/2008-02/27/content_10897630.htm