atw Vol. 63 (2018) | Issue 2 ı February
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discharges a “water curtain” across
the boundary areas separating the
redundant systems. The staff's
present position is that such systems
should feature close-spaced,
open-head sprinklers with water
discharge initiated by tripping a
deluge valve activated by crosszoned
smoke detectors.” Installation
of a “water curtain” partition
within the fire compartment
ensured that both paths were safe
for post-fire hot shutdown.
(4) Install fire separation walls. Specifications:
1. Fire resistance of
3 hours. 2. Extending from wall to
wall and from floor to ceiling.
3. Fire door with a 3-hour rating to
facilitate access by personnel.
4. Air ducts that pass through the
fire separation wall. A fire damper
with a 3-hour rating must be
installed within the section that
passes through the fire separation
wall. 5. A sleeve must be added to
all piping that penetrates the fire
separation wall. The sleeve must
be sealed using fire-resistant
material with a rating of 3 h. 6. The
cable net passing through the fire
separation wall must be filled with
fire-resistant materials with a
rating of 3 h [Generic Letters,
1986]. The post-fire hot shutdown
cable for FZ 17 runs through an
aisle; therefore, fire separation
walls are feasible only in FZ 1.
The definitions and improvement
plans associated with inventive
principle #10 are as follows:
10a: Perform all modifications in
advance. Rearrange cables (relatively
low cost.)
10b: Install items or systems in
advance to ensure that they are
ready when and where that may
be.
FZ 1 contains mostly Series A cables
as well as 22 Series B cables. The
post-fire hot shutdown cable list
( Table 5) revealed that 11 of the
cables (number 1-11) can be re-laid
along new paths, such that only 11
cables (number 12-22) from Series B
remain within FZ 1. At this point 10b
No.
SSD
Equipment No.
Status
9. Symposium zur
Endlagerung
radioaktiver Abfälle
Vorbereitung auf KONRAD –
Wege zum G2-Gebinde
18. – 19. April 2018 in
Hannover
Inhalte u. a.
• KFK – Herausforderung aus Sicht eines
EVUs
• Endlager Konrad – Baufortschritt und
Stand der sicherheitstechnischen
Überprüfung
• Aspekte der Endlagerungsbedingungen
• Entsorgung von Altabfällen
• Vorgehensweisen bei der stofflichen
Produktkontrolle
• Optimierte Prüfung von Antragsunterlagen
Das detaillierte Programm finden Sie in Kürze
unter: www.tuev-nord.de/tk-era
Organisation:
TÜV NORD Akademie
Meike Langmann
E-Mail: mlangmann@tuev-nord.de
Telefon: 040 8557-2046
OPERATION AND NEW BUILD 101
1 B-EF-HV203 ON
2 B-EF-HV206 ON
3 B-EF-HV221 ON
4 B-EF-HV222 OFF
5 B-EF-HV230 OFF
| | Tab. 6.
Valve states in hot shutdown mode.
Operation and New Build
The Application of Knowledge Management and TRIZ for solving the Safe Shutdown Capability in Case of Fire Alarms in Nuclear Power Plants ı Chia-Nan Wang, Hsin-Po Chen, Ming-Hsien Hsueh and Fong-Li Chin
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